Includes:

Monster rotor 255mm 505219

Harmony adapter 547002

CNC motorized sprocket 532620 select below

Monster caliper adapter 505220 attaches to a standard caliper
Standard Disc brake caliper 505203 (includes installed caliper pads)
Extra disc brake caliper pads, also included 505214

Application:  Video

For a frame with a welded rear disc brake bracket - example 1   example 2

The center hole bolts on to a standard 6-bolt disc brake hub - example

This kit is for custom bicycle builders; frame modifications may be required; the 255mm Monster rotor may touch the frame's chain stay or seat stay; the frame must have a bracket welded on to receive the caliper with the Monster adapter; the frame's mid sections must be large enough to receive a 2-stroke or 4 stroke gas engine kit. 

Important Warning Instructions.  Thread locking glue not included.  Use thread locking glue between all screws including the 6 holding the rotor, and the 6 holding the motorized sprocket.  Be sure to use Loctite Threadlocker Red 271 High Strength, or equivalent glue.