The GX Eagle Transmission T-Type cassette is the main reason why Eagle Transmission offers the best inboard and outboard shifting performance under load. Thanks to the full X-SYNC design, the harder you pedal, the better it shifts. Designed for a 55 mm chainline, for less extreme chain angles across the entire range and for greater precision. The 520% range has been optimized with larger 38 and 44-tooth cogs before the 52-tooth cog to improve gear steps in the low end (compared to the 10-52 tooth Eagle cassette). Installation is simple and foolproof, thanks to the presence of a clearly marked ...