Welcome to Custom Built eBikes.

Dear Valued Customers,

It is with a heavy heart that we announce the closure of our business. Unfavourable market conditions and people opting to buy often inferior products from overseas supplies after talking to us has led to a serious reduction in our business. We estimate that only around 10% of the lengthy calls we take every day lead to purchases from us. We’re sure that this is common to many small businesses, however, it just isn’t sustainable when sale volumes drop as low as they have this year.

Our batteries have never been the cheapest available; this is because we have only used branded parts and have placed an emphasis on safety rather than budget.  Despite the media coverage showing the dangers of buying batteries of unknown source from offshore or private suppliers, many people continue to do so, and we get to hear some of their horror stories.

As a token of our appreciation for your loyalty, we are offering a final closing down sale on our remaining inventory of high-quality batteries, motors and accessories. This is your last chance to acquire our reliable and safe products at a special discounted price. Thank you for being a part of our journey.

Making your favourite bike electric!

Transform your beloved bike into a premium eBike for less than the cost of a prebuilt one. It’s an eco-friendly choice that reuses your quality bike, which likely surpasses off-the-rack models. 

The kits are designed for straightforward and easy installation at home.

Custom built eBikes are often more powerful, can have greater range, cost less and are easier to maintain than pre built eBikes.

 

Our kits are designed to convert conventional bikes into ebikes.
Some full suspension bikes are suitable, but please check the measurements of all products before you buy.

It's as easy as BUY, BUILD, EBIKE!

BUY

Buy the kit from our shop (we deliver next day in most cases)

BUILD

If you love bike DIY then you can easily convert your bike at home.

EBIKE

You're ready to go!

batteries

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motors

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workshop build

Let us do the work

Featured Motors

Road Legal - Bafang 250w
Road Legal - Tongsheng 250w
MOST POPULAR - Bafang 750w
MOST POWERFUL - Bafang 1000w

Why you'll love it

The Bafang BBS01B 250W mid drive electric bike motor conversion kit is UK road legal.   It’s a small motor that fits in front of your pedals, and is subtle in appearance. It provides powerful torque, high efficiency and low noise levels.

Key information:
  • 15 amp controller (built into drive system) with upgraded IRFB3077 mosfets (i.e. reliable)
  • Cadence sensing, gives you the help you need when you most need it!
  • Throttle (legal on converted ebikes but not on store bought)
  • Fit BSA cartridge style bottom bracket of between 67mm and 73mm
  • LCD Display – C965A
  • 44T/46T/48T/52T chainwheel – you choose the size to suit your style of riding!
  • Replacement cranks (both sides!)
  • Speed Sensor and magnet
  • All required cables

Why you'll love it

The Tongsheng mid drive 250W motor is a great way to upgrade your bike to an ebike – and remain completely road legal. Unlike the Bafang motors, the Tongsheng is all about the peddling experience – it rewards your effort by helping more as you pedal more (it has a built in torque sensor). They are also significantly smaller and lighter than the Bafang units.

Key information:
  • 36V 250W mid drive motor with torque sensor
  • Brake sensors are not required
  • No thumb throttle – this provides assistance when you pedal
  • Suitable for most bikes
  • LCD Display
  • 42T chainwheel
  • Replacement cranks (both sides!)
  • All required cables
  • Fits 68 – 73mm BSA cartridge style bottom bracket

Why you'll love it

The Bafang BBS02B 750W electric bike motor conversion kit is our best selling electric bike motor conversion kit. 

The motor is very small and fits in front of your pedals, and is subtle in appearance. It provides powerful torque, high efficiency and low noise levels. Please read our fitting guide here.

All motors are reprogrammed using the ‘Hot Rod’ settings for your ultimate performance. If you want to reprogram your controller, then consider buying a USB programming kit.

Key information:
  •  25 amp controller (built into drive system) with upgraded IRFB3077 mosfets (i.e. reliable)
  • Cadence sensing to give you assistance when you most need it
  • Replacement cable brake levers with motor cutouts (Hydraulic cutout sensors optional extra)
  • Bafang thumb throttle (may be used on both sides). The kit gives you pedal assistance and a throttle.
  • LCD Display – Bafang DPC-18 – Full Colour
  • 44T/46T/48T/52T chain wheel – make your choice based on your riding style.
  • Replacement cranks (both sides!)
  • Speed Sensor and magnet
  • All required cables

Why you'll love it

With explosive power, this is the only Bafang motor compatible with wider bottom brackets. It’s very popular with our fat bike customers, or just those people who want the ultimate off road power. We can supply in 52v or at request we can program for 48V. 

We provide a screen without additional charge – please bear this in mind when comparing our price to others on the internet – we do aim to be the best value online retailer with UK stock and UK warranty.

It provides huge torque levels (160NM), high efficiency and low noise levels.

All motors are reprogrammed using the ‘Hot Rod’ settings for your ultimate performance. If you want to reprogram your controller, then consider buying a USB programming kit.

Key information:
  • New version with light output and gear sensor connector
  • Cadence sensing, not torque sensing.
  • Integrated controller (12 MOSFET / 28A)
  • Bafang thumb throttle (may be used on both sides)
  • LCD Display – Bafang DPC-18 – Full Colour
  • Replacement cranks (both sides!)
  • Speed Sensor and magnet
  • All required cables

Below are a selection of our real eBike conversions

Just click on the dots to find out more!

Tongsheng 250w 36v motor

36v 19Ah Small Triangular Bag Battery

Tongsheng VLCD5 Display

eBike headlight 5w

Small Triangular Bag Battery
36v 12.5Ah

250w 36v BBS01 Motor

DPC 18 Screen

Bafang BBSHD 1000w 52v Motor

52v 20Ah Triangular Bag Battery

52v 19Ah Downtube Battery

1000w BBSHD Bafang Motor

1000w BBSHD Bafang Motor

52v Downtube Battery

36v 19Ah Small Triangular Bag Battery

250w BBS01 Bafang Motor

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