MRP 2x Chain Retention System 39/42T ISCG-05 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
MRP 2x Chain Retention System 39/42T ISCG-05 White. The 2x chain guide provides robust chain retention and chainring protection for 2×10 and 2×9 drivetrains.
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