Park Tool CC-4.2 Chain Wear Indicator – Precision Bike Chain Checker Tool
Protect your bike’s drivetrain and ensure smooth, reliable shifting with the Park Tool CC-4.2 Chain Wear Indicator Tool. Designed for accurate, hassle-free chain wear measurement, this precision gauge helps you know exactly when to replace your bicycle chain, preventing premature wear on expensive cassettes, chainrings, and derailleur components.
The CC-4.2 Chain Checker uses a laser-cut drop-in design to measure a long section of your chain, contacting the links at three critical points for fast, precise wear assessment. Compatible with 5 to 13-speed derailleur chains, including SRAM® T-Type, SRAM® Flattop™, Shimano® XTR® 12-speed, Campagnolo® Ekar™ 13-speed, and even single-speed chains, this tool identifies 0.5%, 0.75%, and 1.0% wear thresholds, ensuring optimal drivetrain performance and extending component life.
Engineered and Made in the USA, the CC-4.2 is durable, reliable, and backed by Park Tool’s limited lifetime warranty, making it an essential addition to any cyclist’s toolkit.
- Precision chain wear indicator to prevent drivetrain damage
- Measures 0.5%, 0.75%, and 1.0% chain wear for timely replacement
- Compatible with 5-13 speed chains, including SRAM®, Shimano®, and Campagnolo®
- Drop-in laser-cut design for fast, accurate measurement
- Works on derailleur and single-speed chains
- Made in the USA with Park Tool quality
- Helps extend cassette, chainring, and derailleur lifespan
- Lightweight, portable, and easy to use
Applications
- Road, mountain, gravel, and hybrid bikes
- 5 to 13-speed derailleur chains and single-speed setups
- Drivetrain maintenance and chain replacement checks