E-Bike Kit Reviews

DIY e-bike builders are a crazy bunch – I’ve been doing it for a living for nearly three years and I still have to question my sanity sometimes! If you are thinking of taking the plunge and building your own e-bike, I have posted a selection of honest ‘warts and all’ reviews and comparisons on some of the best electric bike conversion kits currently available.

I have extensive knowledge of all the kits reviewed here, and have personally installed nearly two hundred electric bike kits through my career.

I will be focusing primarily on the popular Bafang and Tongsheng mid-drive systems, and will also be adding detailed reviews of the 250w – 1000w front and rear wheel hub motor kits. See my article on the top 5 best electric bike kits for 2019 This article also includes a buyers guide on choosing the best conversion kit for your particular needs.best electric bike conversion kits

If you are looking to build an insanely quick e-bike, there are also plenty of excellent kits available. I have compiled a shortlist of some of the best selling fast electric bike kits currently on offer.

Why a conversion kit and not a ready built e-bike?

An electric bike conversion kit can be a cost effective way to transform your bike into an e-bike. In my article electric bike vs conversion kit I will go over the pros and cons of buying a factory built e-bike versus converting a bicycle you already own.

If you are bothered about the e-bike laws in your country it would be worth checking out the legality of your planned build before choosing a motor kit. Different countries have different laws relating to electrically assisted bicycles. UK and EU electric bike laws differ from the USA and Canada.

You will also need to find the right lithium battery pack to go with your conversion. My article explaining the basics behind electric bike batteries can be found here.

electric bike battery

Is converting a bicycle to electric assist easy or difficult?

Different bikes can throw up different challenges, but I would say on the whole, most electric bike conversions are fairly straightforward. You will certainly need a degree of mechanical knowledge (and patience) in order to do the job properly. I have been doing it for nearly three years, and I still make mistakes from time to time!

Make sure you have the right tools for the job. There is nothing more frustrating, than making a start only to find you have to pop out to your local bike shop for a spanner or socket. I would also recommend getting a bike stand.

Choose your donor bike wisely

Personally I would go for something like a hardtail mountain bike or a hybrid. Ideally, something that isn’t too fancy and hasn’t got a pressed fit bottom bracket (a right pain if you are going to fit a mid-drive motor).

hybrid city bike

If you are fitting a front or rear wheel hub motor, you will need to make sure your bike hasn’t got thru-axles, as you will not be able to install the motor wheel.

GP-LB01 mid-drive motor


All the kits reviewed in this section are from well established brands . I will offer you my own personal opinion on each motor, and will not just promote the good points but will also make you aware of the bad points and any reliability issues.

Ultimately, I want you to make the right choice. Building your own electric bike can be fun and rewarding, but it can also be a right pain, if things don’t go to plan.

The good news is,  there are loads of videos on YouTube detailing how to fit these kit. I will be posting an article on installation in the near future.

If you need any help or advice, please feel free to use the contact form at the bottom of this age and I will get back to you within 24hrs.

Check out the table below for links to the cheapest place to buy electric bikes conversion kits with global shipping

Bafang BBS01B 250w mid-drive kit with choice of 36v batteries - International Shipping
Bafang BBS02B 36v 500w mid-drive kit - International Shipping
Bafang BBS02B 750w mid-drive kit with choice of 48v or 52v batteries - International Shipping
Bafang BBSHD 1000w mid-drive kit with choice of 48v or 52v batteries - International Shipping
Tongsheng TSDZ2 250w / 350w / 500w 36v or 48v - International Shipping
GP-LB01 mid-drive motor 250w / 350w / 500w 36v or 48v - International Shipping
Electric Bike Batteries - 36v / 48v / 52v / 72v - International Shipping
All the suppliers that are linked to in this table are trusted sources that I use regularly. They provide excellent customer service, and communication is always good.

The kits listed below are capable of producing an insane amount of power, make sure your bike is up to the job.  Some of these kits can also be used to electrify a small motorcycle.

Fast Electric Bike Kits

Fast Electric Bike Kits (Global Shipping)Product Photo
1000w Electric Bike kit1000w electric bike kit
1500w Electric Bike kit1500w electric bike kit
72v 2000w Electric Bike Kit2000w 72v electric bike kit
3000w 72v Electric Bike kit with 750c color display 3000w electric bike kit
50H QSV3 48v-120v 5000w Electric Bike hub motor5000w electric bike hub motor
72v 8000w QS 273 Electric Bike kit with color display and bluetooth72v 8000w electric bike kit
48v / 52v 20ah Hard case triangle battery52v 20ah hard case triangle battery
72v 21ah Electric bike triangle battery72v 21ah triangle electric bike battery

2 thoughts on “E-Bike Kit Reviews

  • February 6, 2019 at 1:25 pm

    Hi Tony. Ive found your website very informative. I am considering fitting a 250w bbs01, but due to budget constraints (£250)my choice of donor bike is restricted. I am looking at either the rockrider range from declathlon or the carrera range from halfords. Would these bike be compatable with the bbs01?
    Thankyou, John.

    • February 6, 2019 at 2:19 pm

      Hi John,
      I have installed the Bafang BBS01 and BBS02 on all of the Carrera range of bikes. The only issues I experienced were, the bottom brackets are always very tightly fitted and can be difficult to remove. And usually, you will need to take a rounded file to smooth off some of the rough edges inside the bottom bracket shell, in order to get the motor axle to fit in.

      I have also fitted the Bafang motors to the Decathlon B’TWIN Rockrider 520, 540 and 540s. These were all very straightforward conversions. The bottom brackets always came out relatively easily, and no filing was necessary.

      If you have any more questions, please feel free to ask.



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