- For fitting SRAM and Truvativ GXP cranksets to PressFit non-threaded bottom bracket shells (not for BB90/95 Trek Madone/Fuel, or BB30 systems) - Includes 37x24x8mm bearing set with wave washer and bearing shields for use on Giga X Pipe cranks with integrated 24mm GXP spindle (Road: 47.5mm chainline, MTB: 51mm chainline) - Steel sealed bearings with composite cups - Use of a shop-quality headset press recommended for installation