SRAM X5 Rear Derailleur - 9 Speed, Medium Cage, Black
<ul><li>ESP compatible (1:1 actuation ratio) for ESP trigger or twist shifters<li>Di.R.T (Direct Route Technology) for light-effort shifting performance<li>Alloy outer link and B-knuckle with Grilon composite P-knuckle<li>Steel cage with serviceable precision pulleys <li>8/9-speed compatible with top-normal resting position<li>speed: 8/9sp<li>cage: medium<li>min/max: 11/34T<li>capacity: 37T<li>weight: 275g<li>color: black/black</ul>