The GX Eagle T-Type 12-Speed Cassette is a key reason why Eagle Transmission offers the best-ever inboard and outboard shifting performance under load. Thanks to its full X-SYNC design the harder you pedal the better it shifts.From its massive 520% gear range the 52 tooth cog steps down with improved gear progression with 38 and 44 tooth cogs in the low end (compared to the Eagle drivetrain 10-52-tooth cassette)55mm chainline compatibility for more moderate chain angle longer wear and greater precisionFeaturing a clearly marked Setup Cog install is both simple and fool-proofUtilizes a Pindome design for gears 1-8 and a single piece mini-cluster for gears 9-12Nickel plating delivers top-tier durability as well as a quiet shift experienceCompatible with the well accepted and broadly available XD driver body