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MRP 1x Guide V3 ISCG-05 Boost Alloy

The MRP 1x Guide V3 adds security to narrow/wide 1x drivetrains, perfect for riders and racers who want a light, security back-up for their chain. Freshly updated, the MRP 1x Guide is lighter & quieter than ever before thanks to a new co-molded TR upper guide. New wide chain line adjustment guide (CHMRUV3OK) is designed for new bikes with 148mm boost rear end but 3mm wider ISCG 05 tabs. This guide corrects any chain guide alignment issues with Boost bikes, setting the upper guide back on the correct chainline alignment. MRP 1x Guide V3 ISCG-05 Boost Spacing Features Alloy construction ISCG 05 New Co-mold rubber upper guide for truly silent running 26-38T Compatibility Wide Chain-line adjustment guide for Boost cranksets (~52mm chainline)

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