Shimano m5120 deore 10 11sp sha rear derailleurthis rear mech is specifically designed for fast and fun mtb rides, as it gives you dependable shifting performance and durability'. '.strtoupper('i')t features shadow plus technology, which uses a super low profile design and an optimised slant angle for amazingly light shifting action on the toughest of rides'. '.strtoupper('s')hadow plus also uses a chain stabilising switch that when on will reduce chain bounce in rough terrain, so you can enjoy a more confident shifting experience as you explore the trails.features link material alloy finish fluorine coated link pin bushings use mtb speed 10 11 speed size long cage type rear cable routing direct cable routing links wide links and pivot body bearing pulleys 11t bearing pulleys max low sprocket 46t 1x10 speed 42t 2x11 2x10 speed profile low profile clutch option 41t capacity sgs long cage compatibility hg x11 11 speed and hg x 10 speed compatible single or pair singlepart numbers rdm5120sgstechnologies shadow plus shadow plus features a super low profile design and optimized slant angle for super light shifting action'. '.strtoupper('s')hadow plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shifting'. '.strtoupper('w')ide link wide link design for greater torsional rigidity improves shifting response and service life'. '.strtoupper('s')ingle tension spring single tension spring prevents contact with the chainstay resulting in a silent ride'. '.strtoupper('t')op normal spring uses the spring to select higher gears'. '.strtoupper('s')trong return spring for a positive shifting feel'. '.strtoupper('d')irect cable routing direct cable routing prevents snagging from any trail side hazards.a 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.