Integrated carbon composite/aluminium spider construction &8226; Unidirectional Carbon Fibre Guard &8226; Al 7075-T6 chainring bolts &8226; Chainline: 49.5 &8226; Chainring Options 26-39 (120/80 BCD), 28-42 (120/80 BCD), 30-45 (120/80 BCD) &8226; Bottom Bracket (BB) options GXP, Press Fit GXP, BB30 & Press Fit 30 &8226;BB sold separately &8226; (Black Box Ceramic Bearings standard on all BB options) &8226; Weight: 694g (BB30), 754g (GXP w/ BB)