The SRAM GXP Team Cups Bottom Bracket features GXP technology for improved performance and durability. GXP systems use a unique design where the left-side bearing is captured between the spindle and crankarm, allowing the drive-side bearing to float axially. This eliminates the need for side-loading bearings, reducing wear and simplifying installation. The GXP Team Cups utilize two bicycle-specific cartridge bearings and eight seals, including the Gutter Seal system, which provides enhanced protection against contaminants and reduces friction by 35% for a smoother, more responsive ride. The box includes sealed cartridge bearings, threaded cups, a center tube, and spacers. Requires a 16-notch BB installation tool. For optimal results, have your frame faced by a professional bicycle mechanic. This specific model is designed for 73mm or 68mm English (BSA) threaded bottom bracket shells and is compatible with SRAM GXP interface cranks with a 24mm spindle and 51mm chainline. MPN: 00.6415.045.000.