XS-1295 The X0 Eagle T-Type 12-Speed 12-Speed cassette is a major reason why Eagle Transmission offers one of the best-ever inboard and outboard shifting performance under load. Engineered as integrated and interdependent transmission components, the X0 Eagle T-Type Tranmission Cassette and derailleur contact directly, ensuring perfect alignment on every bike. Beyond its unique and stunning Dark Polar finish and electroless nickel plating for incredible resistance to corrosion and wear, its full X-Sync design literally means 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 44 and 38 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 precision Featuring a clearly marked Setup Cog, install is both simple and fool-proof Hardened tool steel machined X-Dome design for the cluster and stamped steel 38t and 44t cogs are pinned to the lighter weight aluminum 12th gear (Spider Cog) Utilizes well accepted and broadly available XD driver body Fully eMTB approved