Wheels Manufacturing Threaded External ABEC-3 Bottom Bracket Description: The Wheels Manufacturing Threaded External ABEC-3 Bottom Bracket combines reliable and dependable performance with colorful style. Quality enduro bearings with silicone seals will have this bottom bracket feeling smooth for seasons to come, while detailed construction maintains durability and serviceability. Features: External bottom bracket for BSA thread bottom brackets Quality machined aluminum cups with gorgeous anodized finish Compatible with 24mm diameter crank spindles (Shimano, FSA, Race Face, etc) Enduro ABEC 3 sealed bearings run smooth for years, and are easily replaced/serviced Specifications: Frame Interface: BSA/English Spindle Interface: 24mm (Shimano Hollowtech II, FSA MegaExo, FSA MegaExo Light, RaceFace EXI) Shell Width: 68mm, 72mm Bottom Bracket Shell I.D.: 33.6-33.9 mm Weight: 105g Color: Red