Description
Bottom bracket CeramicSpeed bb90 coated trek 37x90.5 sh, fsa, rotor 24mm
Bottom bracket BB90 coated Trek 37X90.5 for Shimano, FSA, Rotor 24mm black For BB90 frames box width 90,5mm diameter 37mm For Shimano, FSA, Rotor 24mm CS bearings last 3 times longer than other bearings. Ceramic balls 100% smoother and 15% harder than the ceramic competition. Average drag reduction of 75% compared to most BB's Coated products: increase bearing ring hardness, avoid wear. Metallic layer 75% harder than hardened steel. Applied very thinly and evenly over the entire inner and outer surface
