Designed for drive-side use only, the DR rear hub guard presses directly over existing Cinema hub hardware to protect your chain, driver and hub shell on grinds. Injection molded from super durable nylon material, this guard can handle some serious abuse while still being affordable and easily replaceable. Compatible with 2018 Cinema VX2 cassette, 2018 Cinema FX freecoaster, 2018 Cinema ZX cassette and Federal V4 freecoaster hubs. Weight: 32g / 1.1oz.