Octane One 3-PCS Cro-Mo Crankset Super strong & affordable, 3 piece crank set made from high quality seamless cro-mo steel. Offered with standard threaded 19mm Euro BB & compatible with all MTB type frames with 68mm wide BB. Durable axle on 4 sealed bearings & strong seamless cro-mo crank arms. Revised smoother great looking square crank arm shape for 2013. Octane One 3-PCS Cro-Mo Crankset Specifications: Arms: 170mm length, cro-mo seamless 4130 Axle diameter & bearings: 19mm x 8t Euro BB with 4 sealed bearings included Compatible with all MTB frames with 68mm Euro BB Weight: ~1190g (total with arms & bearings)