.9-Speed - Sun Race RDM91 Rear Derailleur Sports Cap Construction: Injected shell for lightweight

Construction: Injected shell for lightweight durability and shock absorption

at lower speeds and edge angles the sidecut is less engaged for more maneuverability and ease-of-use

Rocker/Camber/Rocker Profile: Optimizes versatility across various snow conditions and terrain types

Polylana uses less 76% less energy

and a supportive design

.9-Speed - Sun Race RDM91 Rear Derailleur Sports Cap Construction: Injected shell for lightweightProduct Details 9 speed MTB rear derailleur Aluminum bracket Engineered polymer and steel construction SHIMANO Equivalent RD M430 RD M390 RD M370 RD M280 Product Specs Speed: 9sp Max: 36 Wrap: 45 Cage Mount: Long Ratio: 2to1 Color: BLK Wgt: 342g Type: Mechanical