KMC - X9 CHAINS KMC - X9.93 Extra StretchProof Mushroomed Pin, enhanced durability Outer plate and inner plate chamfering Double X Bridge Shape Compatibility: SHIMANO and SRAM 9 speed drivetrain systems KMC - X9EPT ECO PROTEQ Made to withstand the rigors of a 650+ hours salt spray test without rusting Extra StretchProof Mushroomed Pin, enhanced durability Double X Bridge Shape Compatibility: SHIMANO and SRAM 9 speed Offroad drivetrain systems) KMC - X9L LIGHT WEIGHT Weight and chain suck reduction Double X Bridge Shape Double X Durability Non-Directional Ti-Gold Coating Compatibility: SHIMANO and SRAM 9 speed drivetrain systems __________________________________________________________________________________________________ Size:1/2"x11/128" | Compatibility: SHIMANO, SRAM and all other 9 speed drivetrains. Suitable For:Trekking Down Hill Mountain Bike Road Bike Cyclo-Cross City Touring.