help pls, how to set up a motorized bicycle with disk breaks

[szymon]

hello I've got a kit from ebay coming next week and I have a bike with rear disk breaks I was going to take them out and replace them with the sprocket but I don't want to get rid of back break so is there anyway around it
thanks

 

[crassius]

there should be a hole above the tire to attach a caliper brake (tektro has a cam operated caliper brake with almost the stopping power of a disk) - there are tophat adapters that will fit some bikes to keep the disk brake along with the sprocket - there are drum brake rear wheels that may fit some bikes and have room for the sprocket

 

[butre]

either replace the rear brakes with rim brakes or figure out a way to use both. maybe figure out a sprotor setup if you're feeling fancy. sprotors aren't ideal but they look cool as hell and I personally don't rely much on my back brake anyway.

 

[FurryOnTheInside]

Photos would help.
If your rear wheel rim is suitable for rim brakes, and your frame has that central hole that Crassius mentioned, I would use that. I'd try to find a v brake mount and a basic v brake rather than a caliper, personally. Someone has done this and posted a photo but I don't know how to find it again now.

 

[Jonj57]

I've seen a lot of people using the rear sprocket as a disc lately and they all report it's working great.

What I'd recommend is a shift kit or either a V-Brake or a dual pivot caliper brake of decent quality. Both have good enough stopping power as long as you still have a disc up front.