vax
100 W
Hrllo, I wonder is there a motor, that can be bolted to brake disc holes.
Can it be done, I want try to build something like this.
Can it be done, I want try to build something like this.
bolt-on dd motor
- Thread starter vax
- Start date
vax said:
Do you mean a motor with holes for disc brakes? Or an external motor that can be bolted to the disc brake holes of a standard bicycle hub. The former are everywhere, the latter I've never heard of, but could be an interesting way to power a wheel.
spinningmagnets
100 TW
Yes, this can be done. If there is ever a trade dispute between the US and China (currency devaluation/suppression, etc0 the hub motor supply might dry up for a while until it is ironed out. Adding a non-hub to drive a sprocket on the disc brake flange is an easy back-up plan.
It is easy to make an adapter disc to attach a 130-BCD chainring to the 6-hole disc-brake flange. Here is a disc adapter I made many years ago:
It is easy to make an adapter disc to attach a 130-BCD chainring to the 6-hole disc-brake flange. Here is a disc adapter I made many years ago:
vax
100 W
The latter one.mlt34 said:
This could be so universal and easy mount. I already sorted this out. Motor needs to be like normal dd hub, but inrunner type.
The bearings would need to be bigger diameter than bicycle disc brake hub, so that motor is seated around the hub. There's more space besides spokes. I think it can fit.
And there would be adjustable torque arm extending from the motor casing to frame tube.
vax
100 W
How about 2wd bike this way 
Hillhater
100 TW
i know its not exactly what you are thinking of, but the Zip /Curry drive motors are fixed to the rear drop out and drive via a the wheel hub. ( dont even need to be a disc hub)
..Noisy little buggers though ! :wink:
DAND214
10 MW
What the heck is that cartoon on FACEBOOK?
All in thier minds, with no brakes or nothin. Just a drawing that someone wishes for.
Dan
All in thier minds, with no brakes or nothin. Just a drawing that someone wishes for.
Dan
crossbreak
1 MW
there are some who posted some nice bikes using this drive. It's called "non hub rear drive". You will find some of these in the non-hubdrive section. panurge made my favourite one using an astro 3220 with ~5kW or so.. with the whole bike having a weight below 25kg 
