mrp-2x-chain-retention-system-39-42t-bb-white
mrp-2x-chain-retention-system-39-42t-bb-white, The 2x chain guide provides robust chain retention and chainring protection for 2x10 and 2x9 drivetrains.Integrated skid protects chainrings and glides over rocks and obstaclesModular skid saves 40g when removedPatent-pending dual pulley design provides precise chain engagement while reducing noise and dragRaised top fin profile prevents the chain from dropping to the BB shellCompatible with 9 and 10 speed drivetrains