The RED XG-1290 is the workhorse of SRAM's X-RANGE™ cassettes and not only shifts fast, but also smooth thanks to its wide drive range. The 12-speed cassette was specially developed for the requirements of eTap AXS wireless electronic shifting systems and offers maximum weight savings thanks to its elaborate one-piece design. Works perfectly in conjunction with SRAM's RED Series Flattop® chain and eTap AXS front derailleur components.