Just would like to give this a bump. I am a newcomer to the forums and am planning to install one of Dax's 70cc kits on my Rock Hopper mountain bike.

The Rock Hopper has disc brakes, and I was curious if any has gotten this to work.

It looks like I will have to ditch the rear disc brake if I go with the traditional spoke hub install (the brake itself doesnt look like it would clear the new sprocket)

For some reason (correct me if I'm wrong) I get the impression that you would be able to mount the sprocket to the actual rear disc, rendering it useless but providing a solid mount for the new sprocket. Does that make any sense?

I have another set of non-disc brakes that I was going to slap on in the rear but keep the front disc.

Thanks is advance