FSA T47 Threaded Bottom Bracket for Shimano High quality alloy cups with double sealed stainless bearings that stop water and dust from entering the bearing from inside and outside of the BB shell. For: Road and gravel Thread: T47 Internal Spindle: 24mm Shimano or FSA Megaexo Width: 85.5mm with wave washer and spacer for 86.5 Weight: 127g