With a durable elastic backing

the Spring Classics

and (non-tapered) 1

extremely resistant to shocks and completely waterproof

It's the most common threaded standard employed today

SRAM XX Eagle SL Transmission Cassette - Silver/Black Size:10-52T With a durable elastic backingThe XX SL Eagle Transmission (T Type) Cassette is a major 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. This is the lightest Eagle cassette in history as well as our most precise and long lasting. Its new gen features a fully machined, hardened steel X Dome architecture for gears 1 9 and an ultra lightweight, all