Machined aluminum shell threads together for precise bearing alignment and frame fit, reducing bottom bracket creaking and premature bearing wear. FEATURES: Replaceable Enduro bearings Made in the USA ABEC-5 Angular Contact sealed bearings Angular contact ball bearings are particularly suitable for carrying combined axial and radial loads SPECS: Spindle Interface Type: Shimano Hollowtech II , FSA MegaExo , FSA MegaExo Light, RaceFace EXI BB Shell Width (mm): 68 , 73 Bottom Bracket Shell I.D.: 42 BB/Frame Interface: BB30 Weight: 127