SHIMANO DEORE GS RD-M5130 10 SPEED REAR DERAILLEUR - New in box. Taken out for picture. Description from the web below. Item is in Mill Bay. Shimano’s new M5310 Deore rear derailleur delivers precise and reliable 10-speed shifting at an affordable price point. It features trickle down tech in the form of Shadow RD+ which keeps your chain properly tensioned and helps to reduce chain slap with the integrated clutch mechanism. Support for the Deore 11-43t cassette means you’ll have all the gears necessary to climb up the steepest of hills. System integration with LINKGLIDE means you can natively use the Deore derailleur with LINKGLIDE cassettes for maximum longevity and smooth shifting. With the low-profile design, the Deore derailleur stays out of the way, reducing potential incidents while out on the trails. All in all, Shimano’s new M5310 rear derailleur is proof that excellent shifting performance doesn't have to cost an arm and a leg. FEATURES Shadow RD+ offers a clutch mechanism to maintain chain tension Support for the Deore 11-43t cassette so you can climb up anything LINKGLIDE support for maximum longevity and smooth shifting Low-profile design to reduce potential damage while riding Pulley cage: GS Min sprocket: 11t, Max sprocket: 43t