Chain-Wear Indicator mega15 Original equipment rear derailleur pulleys

Original equipment rear derailleur pulleys for SRAM rear derailleurs

Double X bridge shape with inner and outer plate chamfering for smooth and fast shifting

Safe for use on carbon fiber parts

They are constructed with Wikpro material

high-grip platform pedals

Chain-Wear Indicator mega15 Original equipment rear derailleur pulleysA worn chain shifts poorly and wears sprockets at an accelerated rate. Park Tool's Chain Wear Indicator is a "go no go" gauge designed to accurately indicate when a chain reaches . 5% and . 75%, the points at which most chain manufacturers suggest replacement. The updated CC 3. 2 is longer, more accurate and features permanent measurement markings.