... reducer,there are BJ35-100,BJ39-100,BJ45-120,BJ60-140 four size,1.BJ30-64Length :22 ... diameter:138mmMounting tap hole:diameter is 10mm,8.6 tap holes,PCD is 122.4mmTorque:1500N.mOverrunning ... race diameter:136mmMounting tap hole:diameter is 7mm,6 tap holes,PCD is 121mmTorque:1500N.mOverrunning ... race diameter:149mmMounting tap hole:diameter is 9mm,6 tap holes,PCD is 135mmTorque:2500N.mOverrunning speed ...