SRAM X7 REAR MECH 2008 - The perfect complement to your riding style, with high-quality materials and precise engineering that delivers long-lasting strength and smooth performance. Technology: 1:1® actuation ratio, Direct Route Technology. Speeds: 9 or 8. Material: Alloy, steel. Compatibility: 1:1® actuation ratio. Weight: 270 g long / 263 g med.