The SRAM BB86 Bottom Bracket fits all Sram and truvativ GXP road chainsets. Great value for money and lightweight. A variant of the external bottom bracket, PressFit cut weight by up to 40 grams and provide easier installation by allowing you to press the bearing cups into the frame instead of threading them. There's no change to the crank spindle length and diameter are standard GXP (Red, Force, Rival, Apex).