Sram XO Carbon Rear Derailleur is a combination of Aluminum with Carbon Cage and P-Grilon Nuckles. Lightweight and high performance. A perfect fit for any high end Mountain bike. Medium has full carbon cage, Long (Large) has All Aluminum cage.

---

Specifications: Technology:: 1:1® actuation ratio & Direct Route Technology for lighter effort shifting. Speeds:: 8/9

Weight:: 210g long /197g med. /192g short

Material:: Forged alloy links and B-knuckle, High Strength Grilon® P-knuckle, Machined and heat treated oversized pivot pins, sealed cartridge bearing pulleys, CNC long-cage / Carbon Fiber on med. and short. Compatibility:: SRAM 1:1 shifters (triggers and twisters)

Other:: Available in long, medium and short cage lengths.