Deore M590Low profile Shadow design features direct cable routing and a stronger guide springEliminates chainstay contact32t minimum low gear for proper functionCompatible with all Shimano 9-speed HG cassettes, 9-speed mountain shifters and 9-speed chainsItem SpecificationsColorBlackWeight286gIntended UseMountainCassette SpacingShimano/SRAM 9Shifter/Derailleur CompatibilityShimanoLargest Cog36teethChain Wrap Capacity45teethDerailleur ActionTop-Normal (Traditional)Cage LengthLong