Sram X0 Rear Derailleur

This is an 8 or 9 speed rear derailleur that is compatible with SRAM 1:1 shifters (triggers and twisters).
It has a 1:1 actuation ratio & Direct route technology for lighter effort shifting.
It also has forged alloy links and B-knuckle, a high strength Grilon P-knuckle, machined and heat treated oversized pivot pins, sealed cartridge bearing pulleys, CNC cage assembly and a Titanium extension spring for improved performance.
Weight: 210g long/204g medium.