FSA BB-6000 MegaExo bottom brackets Features-Different models of MegaExo bottom brackets are designed to be specific to each model of FSA crankset-Features alloy cups, composite center tube and stainless bearings-Compatible with pre-2014 Gossamer and Energy cranksets that utilize pinch bolts-Due to varying dimensional tolerances between manufacturers, FSA MegaExo bottom brackets are not compatible with any other brand of crankset Item Specifications-Weight:100-BB/Frame Interface:English-Spindle Interface Type:FSA MegaExo-BB Shell Width:68-Defined Color:Gold-Bottom Bracket Shell I.D.:1.37"