Shimano Dura-Ace NJS Track Sprocket - 1/8" 10mm these cranks must only be

these cranks must only be used with a SG75 compatible bottom bracket

Don’t use the roller when it is worn to the “line”

We can also custom build you training wheels to suit this frame without drama

the quality of work of the mechanic is determined the moment you grasp it

This tool is designed with a knurled edge handle to provide easy torque and control

Shimano Dura-Ace NJS Track Sprocket - 1/8" 10mm these cranks must only beThis NJS Track Sprocket is made of Chromoly and then CNC machined to produce a high quality finish. The end result is a top of the line sprocket for the worlds best. SPECIFICATIONS Material: CrMo Weight: ~38g