SRAM X4 Rear Derailleur 8-speed

Reliability, precision and good shifting performance at an attractive price. Technology: 1:1® actuation ratio and Direct Route Technology for lighter effort shifting. Speeds: 8. Compatibility: SRAM 1:1 actuation ratio shifters (triggers and twisters) only! Material: body: Grilon cage/head/outer arm: aluminium inner arm: composite