Sram x5 10 speed rear derailleurdesigned with sram's expert technology, this 10 speed rear derailleur benefits from exact actuation and direct route technology for precise and effortless shifting'. '.strtoupper('t')his dependable derailleur can be adjusted to suit whatever challenges you meet on the trail, making this reliable component the top choice for mountain bike mtb riders'. '.strtoupper('f')eaturesuse mountain bikespeed 10 speedmaterial alloy b knuckle, alloy links, high strength grilon composite p knucklecage material aluminium, aluminium steelcage sizes long, mediumcapacity medium 39t long 47tsram exact actuation for precise and dependable 10 speed performancedirect route technology for lighter effort shiftingcompatibility 36 tooth cassettepart no rd x5 a1technologiesexact actuation when sram launched the road technology from scratch they reapplied the mtb proven sram 11 actuation ratio shifter cable travel derailleur movement for 10 speed rear shifting'. '.strtoupper('e')xact actuation helps to simplify stabilize the uneasy act of balancing rear derailleur hanger design, tight cog spacing and exact cable tension'. '.strtoupper('t')he result the easiest index shifting system to set up and it stays that way.matchmaker compatible save weight and clutter on the bar with matchmaker'. '.strtoupper('t')his system holds avidreg levers, a number of sram triggers and the rockshox pushloc controlmdashall with one tidy, light clamp.buy sram components from chain reaction cycles, the world's largest online bike store.