Machined aluminum shell threads together for precise bearing alignment and frame fit, reducing bottom bracket creaking and premature bearing wear. Replaceable Enduro bearings Made in the USA Product Specifics Defined Color: Black Bottom Bracket Shell I.D.: 42 Spindle Interface Type: Compatible with Shimano Hollowtech II Spindle Interface Type: FSA MegaExo Spindle Interface Type: FSA MegaExo Light Spindle Interface Type: RaceFace EXI Weight: 127 BB Shell Width (mm): 68 BB Shell Width (mm): 73 BB/Frame Interface: BB30 .
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