Large Choice 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: Griloncage/head/outer arm: aluminiuminner arm: composite