SRAM Force GXP Double Chainset: For 2012 the Force chainset has black rings instead of silver. Competition-focused technology for the serious set, where light weight, strength, & durability come together. Thanks to the unidirectional carbon structure, both GXP & BB30 crankset versions deliver a sleeker & race-proven design. The integrated carbon-spider construction is light & stiff for greater power transfer with less effort & the Power Glide chainrings (black) are competition proven with a long-lasting finish. Arm
Material: carbon, unidirectional Chainring
Material: PG chainrings with hard-anodized coating, alloy chainring bolts Available Arm Lengths: 170mm, 172.5mm, 175mm, 177.5mm Chainring Ratios: 53/39