It seems expensive but is the only one I can find that is UK legal and looks to fit my bike. My bike is a Carrera crossfire 3. 700c, 9speed cassette, hydraulic breaks and I think 140mm dropout. I'm looking to go to and from college which is about 9 mi each way. The most I want to spend is £600.
Electric Bike Conversion Kit E Bike 250w rear wheel complete 36v 48v MODDS | eBay
1x Pedal Assist Crank Sensor. This electric bike kit includes everything you need to convert your conventional bike into a top of the range performance ebike. 36VOLT 250WATT REAR WHEEL CONVERSION KIT.
www.ebay.co.uk