TheSRAM RED XG-1290 12-Speed Cassetteprogresses fluidly and quickly through a wider range of gears. It’s specifically designed for wireless electronic shifting and the one-piece design offers you the best in weight savings. SRAM RED XG-1290 12-Speed Cassette Features Updated design for smoother and faster shifting More gradual gear progression between cogs—at least five one-tooth jumps—while still offering a wider range 10-tooth start helps provide a wider gearing range Designed to work with an XDR™ driver body One-piece machined steel X-Dome™ design for weight savings All Zipp wheels starting from 2012 are XDR™ ready Speed (CS): 12s Gearing:...
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