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Rockrider E-ST 900 Electric Mountain Bike Review

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Is the new Rockrider E-ST 900 Electric Mountain Bike by Decathlon too good to be true?

With ebike technology advancing all the time, it was inevitable that some of the more high-tech wizardry would start trickling down to the cheaper end of the scale. Having looked at the new Rockrider E-ST 900 electric mountain bike from Decathlon, that trickle is more like a flood! In this review I will see if this great new E-MTB is too good to be true.

the new decathlon rockrider e st 900 electric mountain bike is fun to ride

When I first checked out the spec on this bike, I was amazed at what it had to offer at such a low price. Firstly, the Brose ‘T’ mid-drive motor is one of the best on the market.

Specialized have been using the Brose ‘S’ motor on their high-end electric mountain bikes for a couple of years now, and although the ‘T’ version doesn’t produce quite as much torque as the ‘S’ model,  it is still nice to see such a good quality motor on a relatively cheap ebike.

Summary

Decathlon have always designed and produced excellent bikes. Their B’TWIN range has always been popular, but recently they have dropped the B’TWIN moniker from a lot of their bikes.

When  I first looked at the specification of the Rockrider E-ST 900, and then saw the price, I though there had been some mistake! I will go into more detail regarding the specification below, but  lets just say it’s remarkable that they have built such a good electric mountain bike and they can sell it at such a great price.

rockrider e-st 900 electric mountain bike front view

I have ridden and reviewed more electric mountain bikes than I can remember, and nothing has come close to this on price and specification. Usually you would need to be spending at least £500 more to get a similar specification Giant, Cube or Specialized.

The centre piece of this bike is the Brose ‘T’ motor. For those of you who are unfamiliar with Brose, they are a German company and the fourth largest family owned supplier of components for the automotive industry, specialising in electric systems for vehicle doors, seats and electronic systems for steering, brakes, transmissions and engine cooling.

the Brose ebike motor fitted to the rockrider e-st 900

Their Brose ebike motor is widely regarded as one of the best in the industry, and is often seen on high-end electric mountain bikes.

But it doesn’t end there

Not only has the Rockrider E-ST 900 got at fantastic motor, the 36v 14ah (504Wh) Samsung battery should give a potential real-world range of 80 miles plus.

If the electric components weren’t good enough, there are Rockshox  JUDY front forks with 120mm of travel, and the excellent Shimano Deore M6000 1 x 10 groupset, with an 11-42 rear cassette. Tekro TKD 32 hydraulic disc brakes with 180mm discs. And to cap it all off – 27.5″ x 2.8″ tyres on Sunringle DUROC 40 tubeless ready wheels with thru axles.

Anyway, i’m going to stop rambling and get on with the specification overview.

Electric Motor

I think Decathlon have really proven that they are serious about being a major player in the electric bike industry. Choosing the Brose motor is a wise move. Fitting it to an ebike at this price point is a game changer!

As I have said previously, the Brose motor is one of the best in the ebike industry. The ‘S’ version is commonly found on electric mountain bikes in the £4000 plus price range, and the Brose motor is used by over 30 manufacturers worldwide. The Brose ‘T’ motor produces a respectable 75nm of torque, which puts it firmly in Bosch CX and Shimano Steps E7000 territory.

Of course, these motors will produce peak power closer to 400w when in Boost mode, but the top assisted speed is limited in compliance with European law to 15.5mph.

The motor can provide up to 320% extra assist , thanks to the ‘flex power mode’ . The electronic torque sensing pedal assist is one of the most advanced systems currently in use, taking 1000’s of measurements per second.

When you ride a Brose-powered electric mountain bike, you really do feel like you’ve gained superhuman strength!

Not only is the Brose motor powerful, but it is incredibly quite and efficient. Meaning you can stay on the trails for long, and ride further.

Display

Accompanying the motor is an excellent, compact display, that fits discreetly on the left hand side of the handlebar. This tells you everything you need to know, including speed, range, battery indicator and power level – Economy, Economy +, standard and boost.

the rockrider e-st 900 display

I could rabbit on all day about how great this motor is, but I think by now you get the idea. Let’s move onto the battery.

Battery

The compact battery pack that fits neatly into the frame, uses the excellent Samsung SDI 18650 lithium cells. With a total energy capacity of 504Wh (watt hours), this battery is well above the norm for on an e-MTB at this price point.

Combined with the efficiency of the motor, a real-world range of 80 miles should easily be achievable, with a potential range of over 100 miles possible. Of course, if you spend all day hacking around in Boost mode, then you will deplete the battery a lot quicker.

the 36v 14ah samsung battery fitted to the rockrder e-st 900 electric mountain bike

The battery comes with a fast charger, and it can be easily removed using the supplied keys. Lithium batteries should always be charged at a comfortable room temperature. In the winter you would want to take the battery indoors to be charged. In warmer weather it can be charged on the bike.

Gearing

Usually, electric mountain bikes at this price point have fairly entry-level Shimano groupsets fitted – we’re talking Altus, or maybe even Alivio. Decathlon have once again gone above and beyond by fitting Shimano’s excellent Deore M6000 1 x 10 groupset.  This includes an M6000 trigger shifter, and an excellent Deore Shadow+ rear derailleur.

shimano m6000 10 speed groupset on the rockrider e-st 900

Up front there is a perfectly matched 34t  Chainflow and anti-slip chainring. With gearing like this, the Rockrider E-ST 900 is clearly aimed at serious off road riders.

The groupset is finished off with an excellent KMC e10 turbo ebike specific chain. This shows good attention to detail on the part of Decathlon, as the Brose motor will put extra demands on the drive-train.

Brakes

The Hydraulic brakes are courtesy of Tektro. The TKD32 brakes, combined with 180mm disc rotors front and rear provide good modulation and a nice amount of bite. They are middle of the road when it comes to overall braking power, but nonetheless, they are more than adequate for a bike of this calibre.

Wheels and Tyres

The Sunringle DUOC 40 27.5″ wheels are tough and have aluminium hubs with sealed bearings. They are 36mm wide, and tubeless ready, allowing for the extra wide 2.8″ Hutchinson Taipan Koloss tubeless ready tyres.  These tyres will offer a good level of puncture protection, and help with traction on the steep climbs and inspire confidence when negotiating technical trails.

Thru axles add to the stiffness and robustness required for the rigorous off road riding.

Front Suspension

The RockShox Judy front forks are hydraulic and pneumatic, offering 120mm of travel, plus the usual lock-out and adjustment features.  They are fairly entry-level forks as far as Rockshox are concerned, but when you look at other e-MTB’s in this price range, they usually use the very basic Suntour XCM forks, which aren’t a patch on these.

the rockshox judy 120mm forks fitted to the rockrider e-st 900 electric bike

Like I have previously said, Decathlon obviously wanted a budget mid-drive hardtail, that could be used for proper off road riding, and not just light trail riding, like a lot of the other electric mountain bikes around this price.

Finishing Kit

All of the finishing kit is high-quality alloy Decathlon branded. And includes the B’TWIN ergofit EVO saddle, which is designed to be more comfortable for longer days in the saddle.

rockrider e-st 900 handlebars

The stem can be adjusted for height, and the 720mm alloy handlebars ensure good control when riding off road.

Frame

The frame has a more relaxed geometry and is made of good quality 6061 alloy with hydoformed tubes. The battery fits very neatly in the frame, and the welds are neat. This bike comes with Decathlon’s lifetime warranty, so you can be confident that it’s going to stand up to the rigours of off-road riding.

decathlon rockrider e-st 900 frame sizing

Who is this bike aimed at?

This bike is so versatile that it can be used by anyone, from weekend warriors to daily commuters. A pannier rack and mudguards can be easily fitted if required – I personally think this would make an excellent and comfortable commuter bike. Due to the excellent battery range, you could quite easily use it for a 30 mile round trip daily commute, and only have to charge the battery a couple of times over the week.

The Rockrider E-ST 900 electric mountain bike being ridden off road

As far as off-road riding is concerned, this bike is more than up to the job. When you look at the alternatives in this price range, it’s easy to see why the Rockrider E-ST 900 beats them hands down, not only on price, but also specification.

I would be confident in taking this ebike on more challenging trails, and although I do believe it will have its limits, I do think you would have to go some to reach them.

Buy the Rockrider E-ST900 Here

decathlon rockrider e-st 900 electric mountain bike review conclusion
Decathlon UK
Decathlon France
Decathlon Spain
Decathlon Netherlands
Decathlon Germany

Conclusion

Well, what can I say? I’ve ridden and tested a lot of ebikes over the last three years, and nothing has come close to this in terms of value, performance, battery range and components.

With the Rockrider E-ST 900, I think Decathlon have really built an excellent electric mountain bike, and made it accessible to a lot more riders.

Previously, if you wanted an e-MTB with this kind of specification, you would be forking out £2000 plus. Here we have an ebike with all the bells and whistles for nearly a £500 less.

 

decathlon rockrider e-st 900 electric mountain bike review conclusion

For the price, I honestly can’t fault it. I like it so much, i’m tempted to buy one myself! When you compare this side by side with the competition, it becomes plainly obvious that the prestigious brands like Cube, Specialized, Trek and Giant can’t come close to this bike in terms of sheer value for money.

The motor, battery and components all come together to make what is the best electric mountain bike available at the £1600 mark, nothing else comes close, and that’s a fact!

In the next month I will be compiling a list of the top ten electric mountain bikes under £2000, and i’m fairly confident the Rockrider E-ST 900 is going to come up trumps – watch this space!

If you are fortunate enough to own one of these already, please feel free to leave a comment and review below

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Decathlon Rockrider E-ST900 Electric Mountain Bike

£1599
10

Value for Money

10.0/10

Performance

10.0/10

Battery Range

10.0/10

Pros

  • Unbelievable value for money
  • Excellent Brose mid-drive motor
  • Powerful Battery

Cons

  • I can't honestly think of any

45 thoughts on “Rockrider E-ST 900 Electric Mountain Bike Review

  • October 7, 2020 at 4:23 pm
    Permalink

    Value for Money

    10

    Performance

    10

    Battery Range

    10

    Hi – found your review to be really helpful.

    I been biking for yrs and my wife has a Scott road ebike which I occasionally borrowed

    took the plunge for some winter lockdown fun in the Mountains of Cambridge (joke). Cannot fault the bike.
    Re sizing I am 5ft 10 and went for the large which is about right for long bridleway tracks but if you are doing more challenging stuff then maybe go back to the Med.

    After picking it up I found there to be an annoying clank from the motor and I go a puncture on 3rd ride in. Took it in to my local Decathalon and they immediately said they would put new tyres on and they solved the clanking as the free initial service – so that was a good win! I now have a slow puncture on my front! so maybe I should go tubeless?

    I would agree with the gearing – I do find myself shifting for one gear and finding myself at the last one!

    also in the last few weeks have been going through a lot of mud and puddles and it copes really well.

    I looked online for some 2nd hand bikes and so In one respect at the moment this is not a big risk as if you really hate it (which I do not think you will) you could honestly probably sell it and lose a couple of hundred pounds only!)

    I just need to remember to stop grinning when I ride this to stop swallowing mud!

    Reply
    • October 8, 2020 at 7:12 am
      Permalink

      Hi David,

      Thanks for sharing, glad you’re enjoying your bike. I would definitely recommend going tubeless on an e-MTB. One of the main problems with tubes is a tendency to get pinch flats when running at a lower pressure for off-road riding. The initial set-up can be a bit of a pain (and messy with the sealant) but once it’s done it makes all the difference. Another option would be to go for Schwalbe Marathon Plus MTB tyres – I use the road version on my touring bike and haven’t had a puncture in nearly 10,000 miles! They’re a bit on the heavy side but you won’t find a more durable tubed tyre.

      All the best,
      Tony

      Reply
  • August 30, 2020 at 10:34 pm
    Permalink

    Hi, great review. Decathlon are now selling this at £1799, do you think it still represents the best value in the sub £2000 bracket or should I be looking at other options?
    Battery range, reliability and light off reading are key requirements.

    Thanks

    Reply
    • August 31, 2020 at 9:25 am
      Permalink

      Hi,
      I would still say the E-ST900 is great value at £1799 considering all the factors and the specification. I’m still waiting on details of some of the latest 2021 e-MTB models from Cube, Giant etc. But some of the latest bikes I’ve already had a brief look at don’t have the same spec until you get to the £2k mark.

      I hope this helps.

      All the best,
      Tony

      Reply
  • August 2, 2020 at 9:52 pm
    Permalink

    Hi
    I am new to ebikes and can see the value in the E-ST900 is excellent. I am new to ebikes as I suffered a stroke 18 months ago that has left me with a weak left arm and leg. Hence an e bike comes to mind . Recently I rode a Panther rear hub drive bike which really suited me with easy handing geometry, however the price point of this bike is really close to the E-ST900 which technically is in a different class . Can you comment if the rockrider has easy handling . I will only be using on tracks and light terrain but cannot manage larger diameter narrow tryre trekking bike geometry?

    Reply
    • August 3, 2020 at 8:45 am
      Permalink

      Hi Keith,

      Personally I found the handling on the E-ST900 to be very easy going and precise, although this is subjective. The tyres are plus-size 2.8″ wide with 27.5″ diameter and the frame design has a sloping top tube making it easy to mount / dismount. The handlebar is a typically wide 720mm MTB handlebar making the bike easier to control. The grips are comfortable as well. I would recommend going to a Decathlon store if you have one local to you. There is quite a bit of adjustment in the seat height, but if you prefer a more upright riding position it would be worth investing in an adjustable riser stem .

      If you are unable to view the bike in person, you’ll need to measure your total height and inside leg to make sure you get the right frame size. I’ve looked at the Panther Mountain Bike and it does look like it has a higher front-end, but I couldn’t find to frame geometry on their website to make a comparison with the Rockrider.

      I hope this information helps, if you need any more advice, please let me know.

      All the best,
      Tony

      Reply
      • October 28, 2020 at 12:48 pm
        Permalink

        Hi Tony. I hope you’re keeping well? My situation is similar to yours. Have been a keen cyclist for decades and did many a long distance tour. Then at 65 I had faint which was diagnosed as a VT run ,meaning I had to have a ICD fitted. Long and short of it my long distance cycling with pals was curtailed. I tried an E Bike a couple of years ago and was impressed..but not with the weight or price. The review on the E ST900 seems to promise a lot, especially on distance. Whilst I’m still fit and active ,hill climbs, (I live in Edinbugh..plenty hills), are not really advised as the last thing I want is to trigger the ICD and lose my driving licence again, so the range and power of the bike ticks the boxes. A few months on does your review still stand? Regards Mike

        Reply
        • October 28, 2020 at 10:38 pm
          Permalink

          Hi Mike,

          Even though the price has been increased to £1799,the E-ST900 still represents excellent value for money. If you’re looking for an all-terrain e-bike, there’s nothing out there that can match the Decathlon bike for specification at the price. If you’re going to be riding mainly on tarmac, then I would recommend the Vitus Mach E Urban. I’ve just brought one of these myself and Wiggle are currently selling the 2020 model for £1649, which is great value. The Mach E weighs in at around 17.5kg, and uses the excellent Shimano Steps E6100 motor with 504Wh battery. I’ve ridden nearly 100 miles (with over 9000ft elevation) in the last week and still have about 20 miles left of assist left (using ‘eco’ mode only). The Vitus is more road orientated, although I’ve ridden a few miles of gravel track on Bodmin moor and it took it in its stride. The Rockrider is definitely better suited to tougher off-road riding, but could be fitted with mixed-terrain tyres to make it more tarmac-friendly.

          I hope this info helps, if you need any more advice, please let me know.

          Regards,
          Tony

          Reply
  • July 5, 2020 at 12:08 am
    Permalink

    I’m trying to figure out which one i should go for between this decathlon and the giant e+3.
    I know the giant one is more expensive, but which one has the best spec?

    thanks for this review.

    Reply
    • July 5, 2020 at 8:51 am
      Permalink

      Hi,

      The Rockrider has a slightly better spec – 504Wh battery vs 400Wh battery, Shimano Deore 10sp (11-42) vs 9sp (11-36). Brakes are comparable. The main area I feel the Giant Fathom is a little better than the E-ST900 is the Giant / Yamaha Sync Drive Sport mid-drive motor – incredibly reliable and slightly higher torque output. The Giant doesn’t have a display though, just a keypad which you connect to a smartphone via an app. Having ridden both, if it was my money I would be inclined to go with the Rockrider as it’s just got a better overall spec for less money.

      I hope this helps.

      All the best,
      Tony

      Reply
  • June 18, 2020 at 6:42 pm
    Permalink

    Value for Money

    10

    Performance

    9

    Battery Range

    10

    Bought this bike some time ago. First of all I was shocked when I saw the size of it’s tires. They are huge! Almost like a fatbike. I didn’t knew that before, because on photos they don’t look so big.
    Overall bike feels very good. Motor assistance is amazing, you can go up any hill.
    The only ting is that I think it’s gearing is a little too slow. Max speed you can go by pedaling is about 35kmph, more and you have to pedal like crazy. It’s plenty for offroad, but when you go on a beautiful tarmac sometimes you would like to go faster than that. Plus, I found that I mostly use last three speeds, so definitely gearing ration should be bigger. Any ideas is it possible to change the chainring to something bigger than 34 tooth?
    Another thing I can’t find any information, is how to connect a light to this system? Tried searching the internet, but the only light I was able to find costs about 2 hundred bucks. That’s outrageous, considering you can order perfectly fine light for 20 bucks directly from China.

    Reply
    • June 18, 2020 at 10:03 pm
      Permalink

      Hi,
      Thanks for sharing your experiences of the E-ST900 with us.

      I’ve just had a quick look on Decathlon’s website and there is a 44t Brose chainring available that looks like it should be a suitable replacement for the existing one. That should sufficiently raise the gearing so you can pedal at 45km/h.

      Regarding the lights, I had a look and came up with the same results for Brose (very expensive). You’ll probably be best with a decent set of rechargeable lights and use the USB charging port on the ebike display unit.

      All the best,
      Tony

      Reply
  • June 17, 2020 at 4:06 pm
    Permalink

    I’m considering carrera vulcan e bike or EST 900 Decathlon Rockrider your thoughts on performance of motor and reliability and overall opinion thanks John

    Reply
    • June 17, 2020 at 5:57 pm
      Permalink

      Hi John,

      Performance wise the E-ST900 beats the Vulcan hands down. The Brose mid-drive puts out about 70Nm or torque vs about 40Nm on the Vulcan Suntour hub motor. The battery on the Decathlon bike also has a higher energy capacity.

      As far as reliability is concerned, both bikes have had their fair share of issues. The one that plagues the Carrera is the motor cutting out intermittently, although I know a couple of long-term owners of the Vulcan-E and they’ve never had any issues.

      The Brose-T mid-drive motor fitted to the Rockrider is more complex, so there is more to go wrong. Brose motors are generally reliable, but the early generation models suffered from some reliability issues.

      If it was my money, I would go for the E-ST900, it’s more powerful and uses higher spec components. It’s also a more capable bike for off-road riding (Rockshox forks, tubless-ready tyres and Shimano Deore 1 x 10). The Carrera Vulcan E used to be quite a good buy, but the price has increased recently and it’s now only £200 less than the Decathlon bike.

      If you need any more advice, let me know.

      Cheers,
      Tony

      Reply
      • June 18, 2020 at 9:36 pm
        Permalink

        Thanks for all your advice Tony looks like it will be the one for me go Rockontrail with the Rockrider! Happy trails

        Reply
        • June 18, 2020 at 10:36 pm
          Permalink

          No worries, glad to have helped.

          All the best,
          Tony

          Reply
  • May 26, 2020 at 8:03 pm
    Permalink

    Hi guys, I’m looking to purchase the e-st900 as a first ebike. Not sure as to what size I need as according to Decathlons sizing chart, I come in between the medium and large. I am 5ft 10ins in height and have a 32 inch inside leg. Any advice would be welcome as to whether to go for medium or large. Cheers.

    Reply
    • May 26, 2020 at 9:14 pm
      Permalink

      Hi Donny,

      I’m 6’1 and usually go for a ‘L’ frame, you’ve got the same size inside leg as me, but I’ve got long arms. I currently ride a medium frame road bike without any issues, but I have a longer stem and layback seatpost. I would personally err on the side of caution and go with a medium, at least you can raise the seat and buy a longer stem if it feels a bit too small. If they’re any bike shops open near you it may be worth just trying a medium frame MTB for size to see how it feels.

      Cheers,
      Tony

      Reply
      • May 27, 2020 at 10:15 am
        Permalink

        Cheers for the advice Tony. The Decathlon store is around 30 miles from my home, but due to the current restrictions are trading online only. I might as well wait till the store fully opens to pay them a visit. Didn’t want to spend all that money I’ve saved since the pubs closed, and find I had ordered the wrong size. Stay safe.

        Reply
        • May 27, 2020 at 10:32 am
          Permalink

          Sounds like the best plan, from what I’ve read most stores should be open by mid-June, so not too long to wait.

          Let me know what you decide, and feel free to leave a review here.

          Cheers,
          Tony

          Reply
        • November 27, 2020 at 10:14 pm
          Permalink

          Value for Money

          9.5

          Performance

          0

          Battery Range

          0

          My thoughts exactly about waiting for store to re-open, if my knees get any worse from riding nearly every day i am having one of these. for me from what i have read everywhere is the best value for money end of.

          Reply
  • May 26, 2020 at 6:18 pm
    Permalink

    Hi Tony,
    Many thanks for your excellent reviews. I currently ride a Carrera Vulcan bike (not electric)
    Being a very fit 61 year old this bike has served me well, but recently due to a bad knee I have struggled to keep up with my friend who has an e bike. In particular it’s hard to keep going when riding up hills. I am tempted by your review of the Rockrider E ST900. My question is how does this bike ride with out the assistance of electric power?. I guess it’s not as easy as the Vulcan. If I did buy one, then because of my fitness I would only want to use the minimum of motor assistance. Also how does this bike compare with the Haibike Sduro range.

    Reply
    • May 27, 2020 at 7:48 am
      Permalink

      Hi Pete,

      The E-ST900 is a good e-bike, but suffers from the dreaded weight penalty. There’s no discernible pedalling resistance when the motor is switched off, it’s just the extra weight makes the bike feel a bit sluggish (in my opinion).

      I’ve been a big fan of Haibike for years, and the big selling point with these bikes is the Yamaha PW-SE motor. As much as I like the Brose-T motor, the Yamaha motor has the edge in my opinion. The only thing with the Haibike is it’s a bit pricier than the Rockrider and has a lower capacity battery and lower-specification drivetrain (9-sp vs 10-sp). The Decathlon bike is hard to beat for the price.

      If you need any more advice, please let me know.

      All the best,
      Tony

      Reply
      • May 28, 2020 at 4:47 am
        Permalink

        Hi Tony,
        Thank you for your reply. The Haibike SDURO hard seven 1.0 is approximately the same price as the E-ST900. Am I right in saying the E-ST900 has the better spec, with the exception of the motor?. In your expert opinion which bike out of the two would you choose. Many Thanks
        Pete

        Reply
        • May 28, 2020 at 9:37 am
          Permalink

          Hi Pete,

          If it was my money, I would go for the E-ST900. The spec is hard to beat for the price. You would need to spend over £2k to get a similar specification Haibike. From a reliability perspective the jury’s still out on the Brose motor. I’ve heard about a few ongoing issues, but the general consensus is it’s a good motor. I’ve been involved with e-bikes for nearly 5 years and the Yamaha motor is still considered to be one of the most reliable.

          If you decide to go ahead and purchase the Rockrider, please feel free to share your experiences here.

          All the best,
          Tony

          Reply
      • November 27, 2020 at 10:17 pm
        Permalink

        Are the Haibikes not about £500 more or have they come down?.

        Reply
        • November 27, 2020 at 10:43 pm
          Permalink

          Haibike have just released their 2021 models and the cheapest one I’ve seen is the HardNine 4 29er which is about £2000 (if you can find one in the UK). I’ve just had a look on Tredz website and they’ve got a few customer returns going cheap, but frame sizes are limited.

          Reply
  • May 21, 2020 at 12:29 pm
    Permalink

    Hi Tony,

    On decathlons website it states the motor produces 70nm torque and on giants website it states the Giant Fathom E+3 motor produces 80nm torque, reading one of your earlier replies you stated the giant has 70nm torque and someone stated decathlon informed them the brose t motor produces 90nm, could you clear this up for me as I’m a little confused, thanks

    Reply
    • May 21, 2020 at 8:32 pm
      Permalink

      Hi James,

      The Giant / Yamaha Syncdrive motor comes in different states of tune. The Syncdrive pro is 80Nm the Fathom E+3 has the Syncdrive sport which is listed at 70Nm. Regarding the E-ST900, I’ve just checked on their website and they are now listing the Rockrider as 70Nm of torque. The magnesium Brose-S model fitted to some Specialized e-MTB’s kicks out 90Nm. Having ridden the Fathom and the Rockrider, there’s not really a lot to differentiate between the two performance wise. Both motors are really good, but in my opinion, the Syncdrive motor just has the edge in terms of overall feel.

      I hope this clears things up a little.

      Cheers,
      Tony

      Reply
  • May 19, 2020 at 11:05 pm
    Permalink

    Value for Money

    0

    Performance

    0

    Battery Range

    10

    Hi Tony,
    I’m looking to buy an electric bike, for both general biking/mountain biking as well as potentially a commute to work. I would say that I am a beginner/ early intermediate Mountain biker.

    Thanks for your in-depth review. I had a couple of questions- you say that this would be good for a 30 mile round trip daily commute -which is actually just about the distance between my work and my house. That seems like roughly an hour’s commute each way- I have done it before on a normal mountain bike and it was pretty tiring to say the least! Does an electric bike (and I guess this one in particular) really make that much difference such that it wouldn’t be a slog everyday? Second I can see this bike is £1700-obviously a substantial investment. I can also see that you have reviewed the lower range decathlon electric bikes. For someone who is about to buy their first electric mountain bike do you think it’s worth paying for something like this or to start off with something like the EST100 or 500 v2? Obviously don’t want to miss out if it’s worth upgrading rather than buying a better bike fairly quickly.. For reference, my current (non electric) bike is a £500 rockrider. Thanks for your help! Jon

    Reply
    • May 20, 2020 at 8:56 am
      Permalink

      Hi Jon,

      It depends on how hilly your commute is. I personally think the EST500 v2 should be more than adequate for a daily commute with a bit of light off-road riding on the weekend.

      If you need a bike that has better gearing and forks for tougher off-road riding the EST900 would be a better bet as the higher torque output of the Brose motor will make it easier to climb steep technical trails, whereas the hub motor will struggle a bit. Decathlon also do the EST520 which is cheaper than the 900, but still uses a Brose mid-drive.

      If you’re mechanically-minded I would consider fitting a Bafang mid-drive conversion kit to your existing Rockrider. I’ve converted quite a few in the past and it would work out a fair bit cheaper. Here is an article on building a DIY ebike.

      Cheers,
      Tony

      Reply
      • May 21, 2020 at 2:24 pm
        Permalink

        Great, thanks for your advice Tony.

        Reply
        • May 21, 2020 at 8:24 pm
          Permalink

          No worries, glad to help.

          Reply
  • April 28, 2020 at 2:20 pm
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    Value for Money

    10

    Performance

    10

    Battery Range

    10

    Unbelievable bike for the money I really can’t find fault with it on road or off it does the business and battery life is great also,the motor is powerful and smooth with no problems so far after 1000+ miles so glad I bought the Rockrider there are better bikes out there for more money but nothing tops this for value for money I could not be more pleased.

    Reply
    • April 28, 2020 at 4:45 pm
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      Hi Frank,

      Thank you for sharing your experiences of the Rockrider with us, much appreciated. Glad you’re enjoying the bike.

      All the best,
      Tony

      Reply
      • June 28, 2020 at 6:45 pm
        Permalink

        Value for Money

        10

        Performance

        10

        Battery Range

        10

        Thanks to your review, I blind purchased the E-ST900 2 weeks ago.

        Your review is very thankfully absolutely spot on, as I find the ST900 fantastic, I really love it.

        It can really perfectly handle all the trails we go on. I really like the very wide tyres, combined with the awesome motor, makes it feel a touch like my off road motorbike when needed.

        The silent motor is so torquey it storms uphill, yet turned down performs perfectly elsewhere.

        My only gripes are that the gearing is a touch low on the road (as previous comments). I may try the 44T cog mentioned, but also like the lower gears as they are, for going uphill if I’m not using the electric, so the 44T may not suit.

        Also I find the LCD display difficult to read in the daylight, as is a bit dim.

        These though are tiny nitpicks on a fantastic bike. A bike that has got a middle aged unfit man, really enjoying riding again.

        Thanks again Tony.

        Reply
        • June 29, 2020 at 11:20 am
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          Hi Glen,

          Thank you for sharing your views on the E-ST900, much appreciated.

          I hope you enjoy many happy miles!

          All the best,
          Tony

          Reply
  • February 11, 2020 at 11:08 pm
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    How does this compare to the Voodoo Bizango E? similar price at the moment – £1649. I’m new toe bikes and can’t make my mind up between the two.

    Cheers

    Reply
    • February 12, 2020 at 9:36 am
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      Hi Matt,

      The Bizango Halfords have on offer is the 2018 version with the Bosch CX motor and 400Wh battery – great bike, but doesn’t have the battery range of the Rockrider (which has a 504Wh battery). Halfords is handy though, if you have any issues. I’ve ridden both bikes and I personally prefer the Rockrider. If you need any more advice, please let me know.

      Cheers,
      Tony

      Reply
  • January 3, 2020 at 2:47 pm
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    I read the statement below in a review on the Decathlon website. Would you like to comment on the question regarding the motor spec. (see below)
    …when buying an electric bicycle, check all the components of what it is made up … a lot of information is wrong. The description shows a 90Nm engine and you think you offer money on what is best, but in reality it is a BOSE (T) engine that has only 70Nm …
    check the bike components on the manufacturers’ official sites
    his note is for those who put in the wrong information, the bike I hope is super.
    decathlon service could explain about this situation then i can change my mind …
    Decathlon’s reply……….
    Thank you for taking the time to review this bike.

    May I reassure you that this is a 90NM motor and is exclusive to Rockrider from BROSE. This model is not visible on the BROSE website which understandably may lead to some confusion.

    I hope you enjoy this great bike.

    Peter, Cycling Manager, DECATHLON

    Reply
    • January 3, 2020 at 10:10 pm
      Permalink

      Hi Dave,

      Thank you for your comment. According to Decathlon, the firmware on the Brose T motor has been modified specifically for the Rockrider.

      Having ridden the E-ST900 and the Gaint Fathom E+3 on the same day, I didn’t really notice much difference between the two bikes (from the e-assist). The Giant uses the Yamaha Sync Drive Pro motor which apparently produces 70Nm. I took both bikes on the same off-road route and I felt the Rockrider performed marginally better – probably due to the 11-42 rear cassette combined with the 34t front chainring vs 11-36 9-speed and 36t front chainring on the Giant.

      I would have expected the (alleged) extra 20Nm of torque to be substantially noticeable on the Rockrider, but I felt the performance was more on a par with the Yamaha, Bosch CX. I’ve also ridden the Specialized Levo Comp Carbon which has the Brose ‘S’ motor, and that did feel a bit quicker on steep climbs, but that could be down the the lighter weight of the carbon frame and magnesium motor.

      Having said that, I still believe the E-ST900 is the best value e-MTB in its class. When compared with the Cube Acid 400, which is £1699 and uses the 65Nm Bosch Active Plus and 400Wh battery, and the Giant Fathom (which costs £1999).

      All the best,
      Tony

      Reply
      • January 7, 2020 at 11:43 am
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        Thanks for your reply and views.

        Dave

        Reply
  • November 28, 2019 at 8:01 pm
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    Compre uma Luz para a bicicleta e.st 900 mas é por usb não da na bik

    Reply
    • December 4, 2019 at 2:34 pm
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      Value for Money

      9

      Performance

      8.5

      Battery Range

      8.5

      I am extremely satisfied with this bike. Everything on the review is accurate.

      Reply
      • December 4, 2019 at 4:06 pm
        Permalink

        Thank you for your positive comments. I have only test ridden the Rokcrider E-ST900 and it is a great ebike for the money – i’m seriously thinking of buying one for myself!

        All the best,
        Tony

        Reply

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