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 - ABEC-5 Angular Contact sealed bearings - Angular contact ball bearings are particularly suitable for carrying combined axial and radial loads Specification - Spindle Interface Type: SRAM/Truvativ GXP - BB Shell Width (mm): 68 , 73 - Bottom Bracket Shell I.D.: 42 - BB/Frame Interface: BB30 - Defined Color: Black - Weight: 127