The GX Eagle Transmission (T-Type) Cassette is a key reason why Eagle Transmission offers the best-ever inboard and outboard shifting performance under load520% range has been optimized with larger 38 and 44-teeth cogs prior to the 52-tooth cog for improved gear steps in the low end55mm chainline compatibility for more moderate chain angle, longer wear and greater precisionUtilizes a Pindome design for gears 1-8 and a single piece mini-cluster for gears 9-12Thanks to its full X-SYNC design, the harder you pedal, the better it shiftsFeaturing a clearly marked Setup Cog, install is both simple and foolproof10-52t12sp10,12,14,16,18,21,24,28,32,38,44,52BlackUPC/EAN/GTIN: 710845910456