UK legal rear hub conversion kit for road bike

whyamihere

Just Joined
Jul 19, 2021
1
0
I'm a complete newbie to e-bikes, but a very experienced pedal bike mechanic, and I have a road bike I'd like to convert to an e-bike. I'm trying to do it with the parts I already have, and am running into some compatibility issues. I've been looking around at various suppliers and I don't seem to be able to find a kit with everything as I need it, so looking for advice on whether such a kit exists. The XF08C and 85SX kits from Woosh get close, but have a few outstanding questions (I've emailed Woosh with some of these as well).

1. I have drop bars on the bike with a 31.8mm flat section in the middle where I would need to mount the display, however most displays seem to come with a 22.2mm clamp designed for flat bars. Are there any displays available which would fit, and are these plug and play with kits such as those supplied by Woosh?
2. I'm looking for a rear hub motor due to having a carbon fork which rules out a front hub for me, and I don't want to replace the cranks with a mid drive conversion. This needs to be disc compatible with enough clearance to allow running a 160mm rotor (I've seen some which require a 180mm rotor, which is too big for the frame) and have a cassette fitting rather than a freewheel. The Woosh motors match this, but are there others to consider?
3. I wouldn't want to run the throttle, and likely wouldn't be able to fit the brake sensors which come with the kits. Are either of these likely to cause problems, either with needing to modify wiring/plug up connector ports or with the motor not cutting out correctly when I stop pedalling?

Thanks!
 

vfr400

Esteemed Pedelecer
Jun 12, 2011
9,822
3,993
Basildon
You need a cassette motor, and I'd be wanting to fit a very light motor on a light weight road bike. The LCDs normally have adapters to alow for both sizes of handlebars, but always check. You cam use strips of inner tube or hoze pipe to make your own adapters. If you want assistance above the legal limit, use a 36v motor and run it with a 48v battery and controller.