SRAM X5 Rear Derailleur - 9 Speed Medium Cage Black ModelNumber=K0558 Made from 7075-T6 aluminum for

Made from 7075-T6 aluminum for long life

RaceFace Narrow Wide Hyperglide+ 1x chainrings are made of 4mm thick 7075-T6 alloy plate for stiffness and strength

EvoCurve is a short and shallow compact drop bar with an oversized comfortable top section

2-sided entry / superior mud shedding

KMC X12 chains feature a double X bridge shape for fast and smooth shifting

SRAM X5 Rear Derailleur - 9 Speed Medium Cage Black ModelNumber=K0558 Made from 7075-T6 aluminum forSRAM X5 Rear Derailleur 9 Speed Medium Cage Black. Affordable and reliable derailleur is great for repairs and upgrades. TECH SPECS Cage Length Medium Chain Wrap Capacity (teeth) 37 Color Black Drivetrain Speeds 9 Largest Cog 34 Rear Der Shifter Compatibility SRAM 1: 1 Rear Derailleur Mount Type 10x1 Standard Weight 290