The Black-Ops Micro Drive II Sprocket are CNC machined from 6061 T6 aluminum. It has a 15/16" (23.8mm) bore and is compatible with 1-piece cranks. This will work with 1/2" x 1/8" chains.
Size: 25T
Color: Red
Can be used with a 19mm 3-piece crank with a 19mm adapter.
