Shimano Deore SM-BB52-D Bottom Bracket Description: The Deore SM-BB52-D Bottom Bracket features lightweight anodized aluminum construction paired with enhanced bearing seals for light, durable, and fast rolling bottom bracket. Its Hollowtech II design makes it compatible with Shimano Hollowtech II 24mm spindles. Features: Compatible with standard threaded BSA bottom bracket shells Fits Shimano Hollowtech II 24mm crankset spindles Bearings are external to the bottom bracket shell resulting in a stiffer wider stance Includes inner plastic sleeve and spacer Inner sleeve helps to protect against water Specifications: Frame Interface: BSA (English Threaded) Spindle Interface: 24mm Spindle Bottom Bracket Shell ID: 1.37 in x 24 TPI Shell Width: 83mm Color: Silver Weight: -