Park Tool CC-3.2 Bicycle Chain Checker 5-12 Speed

Park Tool quality in a bare bones tool. Easy to use and simple to tell if your chain is ready to be replaced.

This is a quick and easy way to check a bike chain. It's nice to take along with you when looking at used bikes.

This is about the most specific tool you can buy. It does nothing but measure your Road bike chain fitness and let you know if it's time for a chain replacement. That's it. It can't do anything else. And lord knows I've tried. I've tried to make a jailhouse shiv out of it: failure; as dull as a butter knife. I've tried to use two as chopsticks at my local Vietnamese Pho restaurant: no dice. I've tried to re-market these as metal back scratchers: One person with a really itchy back bought one but ended up using it for it's intended purpose: to see if your bike chain is stretched beyond its useful life. And for that it's magic! What I really like about this tool is that it has a .5 inch measure (and also a .75 inch measure) that is a finer indicator for high end road bikes. I like to replace my chain when the .5 inch indicator slips too low into the chain links. It's a low tech tool that really is a bit of genius. Any serious or semi-serious Fred should own one.

Works as advertised. High quality tool to keep track of chain wear.

A simple but efficient tool to measure chain wear. I’m using it while I bicycle tour, and it’s sturdy and not too heavy.

A quality tool from Park.

Simple tool, does the job

This is the right checker for 10 and 12 speed derailleurs. Park makes a fancier one that’s more expensive and harder to use.