SRAM engineered the wide range XG-1275 GX Eagle 12-Speed Cassette to be reliable and smooth shifting for infinite freedom on any terrain. Full Pin technology incorporates 11 lightweight stamped steel cogs with 50-tooth aluminum cog and stainless-steel pins for a lighter and more durable cassette. The wide 10-50 gear range combined with the new X-Glide drivetrain offers unparalleled shifting performance that doesn’t compromise on speed or power. This full-power, flawless shifting is accomplished through the redesigned chainring geometry that aligns the chainring pick-up rivet to the chain pivot pin instead of the middle of the chain link. Now you can ride anywhere without missing a shift.