SRAM Rear Derailleur X4 7\/8 Speeds Long cage Black

The X4 Rear Derailluer combines the best elements of SRAM shifting with a stylish design in an affordable price point. Intelligent material selection yields a lightweight high performance derailleur. A compelling option for your 8-speed shifting needs.Features : Speeds 8/7 Speed Material Alloy B-knuckle , alloy outer link, Steel/Composite cage w/replaceable pulleys Weight 280g long cage Colors Silver, Black Outer Cage Steel Compatibility 1:1 Inner Cage Grilon Composite Bearings Bushing Cage Sizes Long , Medium Technology Highlight(s) 1:1 actuation ratio