Shimano m5100 deore 11sp shadow rear derailleurthis 11 speed mtb rear mech is specifically designed to bring even more adventure to your outdoor lifestyle'. '.strtoupper('i')t features a rock solid alloy construction, which makes it perfect at withstanding all the intensity that comes with shredding the trails'. '.strtoupper('s')himano has also equipped this model with shadow plus technology, which features a super low profile design and an optimised slant angle for super light shifting action on the toughest of rides.features material alloy pin bushing finish fluorine coated link pin bushings use mtb speed 11 speed cage sgs long cage profile low pulley tooth count 13t cable routing direct cable routing links wide links max low sprocket 51t 1x 12 speed capacity 40t capacity sgs cage part number rdm5100sgstechnologies shadow plus shadow plus features a super low profile design and optimised 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.single tension spring prevents contact with the chainstay resulting in a silent ride.direct cable routing direct cable routing prevents snagging from any trail side hazards.13t pulleys 13t pulleys and decreased derailleur tension prevent high chain tension in low gears.springs strong return spring for a positive shifting feel'. '.strtoupper('t')op normal spring uses the spring to select higher gears.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.