Park Tool CC-4.2 Chain Checker Tool Taillights Compatible with Shimano 9-speed MTB

Compatible with Shimano 9-speed MTB shifters

Riders who want maximum backup reliability with minimum bulk will find the S-Tubo the smartest option in the Tubolito lineup for CX and gravel riding

this is the wrench that belongs on the bench

The combination reset feature lets you set a code you will actually remember

This pairing ensures threads stay perfectly aligned during installation

Park Tool CC-4.2 Chain Checker Tool Taillights Compatible with Shimano 9-speed MTBWhy is the Park Tool CC 4. 2 a better chain checker than a ruler? The Park Tool CC 4. 2 Chain Checker Tool is a laser cut drop in gauge that measures chain wear at three calibrated points simultaneously, giving you a fast, definitive reading on whether your chain needs to be replaced. Compatible with 5 through 13 speed derailleur chains and single speed chains, it reads wear at 0. 5%, 0. 75%, and 1. 0% stretch, which aligns with the replacement