Need just a little bit lower gear for those big climbs? The Wolf Tooth GCX 44t sprocket replaces the stock 42t on your XX1 or X01 cassette while adding some color if you prefer! This is roughly equivalent to changing your current chainring toa 2t smaller chainring. Shifting performance and durability matches the stock 42t cog but you will have a 5% lower gear. Installationonly takes 5-10 minutes. Compatibility: Only compatible withX01 and XX1 cassettes, XG1195 or XG1199 NOT compatible with any other cassettes Complementing products: For the ultimate SRAMano setup (SRAM cassette w/ Shimano shifting),check out the GoatLink 11 also available from Planet Cyclery. For a full set of instructions be sure to check out Wolf Tooth's page here: http://www.wolftoothcycling.com/pages/giant-cogWolf Tooth Components