EXTREME FAT TIRE BICYCLE

Step 14 Disc brake

I installed the right side disc brake similarly to the method I used for the left side drive chainring.

Instead of using a sprocket adapter, however, I used a go-kart disc brake. It was a solid steel disc for mounting on the live axle.
Disc Brake Rotor with 1" Hub
7.87" OD, 1" Bore with 1/4" Keyway
Part # 400285
SKU Number:400285

All I had to do was drill and thread 6 bolt holes to match the bicycle 8" disc rotor. The difficulty here was the rotor bolt holes were on a circle diameter that did not coincide well with the disc brake. The holes were half in and half out of the main hub portion of the disc brake. I also had to find the right size tap for the rotor bolts. Anyway, after much aggravation, I was able to make it work.

The mechanical disc brake caliper and 8" rotor were Gator brakes purchased from Pricepoint.com. They were the most economical and they work great.

I tightened the caliper to the rotor, then aligned a steel plate and marked the bolt hole locations. I then drilled the holes and welded the plate to the frame.