Chain tool pins are consumables. They wear down, they bend, they break—especially if you're driving through hardened 12-speed plates or if the pin slips off-center during a push. Park Tool's CTP replacement pins keep your CT-series chain tools working instead of turning them into paperweights when the original pin gives out.

Park Tool makes two versions because their chain tools use different pin diameters. The CTP fits the CT-3, CT-5, and CT-7 tools with its standard pin diameter. The CTP-C uses a narrower pin designed for the CT-4, CT-4.2, CT-4.3, and CT-11 tools that handle modern narrow-width chains. Using the wrong diameter means the pin won't seat properly in the tool body, so check your chain tool model before ordering.

Each replacement pin is hardened steel, same as the original that came with your tool. The hardening process matters because chain pins—especially on 11 and 12-speed chains—are themselves hardened. A soft replacement pin would mushroom or bend after a handful of uses. These pins are meant to last through dozens of chain installations and removals before they show wear.... Read More