CC-4.2 Chain Checker

Product Information

A worn bicycle chain can significantly degrade shifting performance and lead to premature wear on expensive drivetrain components. The Park Tool CC-4.2 Chain Checker is designed to accurately measure chain wear, helping you determine precisely when replacement is necessary. This drop-in style gauge utilizes a precision laser-cut steel construction, making contact with the chain in three strategic places for consistent and reliable readings.

It's compatible with a wide range of chains, from 5-speed to 13-speed systems, including modern SRAM T-Type, SRAM Flattop, Shimano XTR 12-speed, Campagnolo Ekar 13-speed, and even single-speed chains. The tool clearly indicates when your chain has reached 0.5%, 0.75%, and 1.0% wear, aligning with most manufacturers' recommended replacement thresholds to protect your entire drivetrain.

Features

• Laser-cut precision steel construction for accurate measurements
• Three-point chain contact ensures reliable wear readings
• Indicates chain wear at 0.5%, 0.75%, and 1.0%
• Compatible with all 5-speed to 13-speed derailleur chains, including SRAM T-Type, Flattop, Shimano XTR 12-speed, Campagnolo Ekar 13-speed, and single-speed chains

Specs

• Material: Steel
• Compatibility: 5-speed to 13-speed bicycle chains, including single-speed
• Wear indicators: 0.5%, 0.75%, 1.0% elongation