The Shimano 105 RD-5701 rear derailleur is an upgrade to the 105 RD-5700 10 speed rear derailleur. The 105 RD-5701 is made to accommodate a larger range of cassettes up to a 30 tooth sprocket. With a wide link design to increase its overall stiffness, the 105 RD-5701 gives you quick and precise shifting no matter the condition. The 105 RD-5701 is built to last and will give you quality performance mile after mile. This Shimano 105 RD-5701 rear derailleur comes as a short cage and features a silver color pattern. Compatible with all Shimano cassettes including the new 12-30.