Park Tool Chain Checker - CC-2 $29.49
It's the little things that count.
The Park Tool Chain Checker resolves unanswered questions about the life left in your chain. Broken chains suck, and worn chains don't shift well, so give your a check-up with the Park Tool Chain Checker.
What community has to say
nice tool but not necessary
- Familiarity: I've used it several times
You buy this tool and after a while you realize that a chain life is about 2500 miles. Forget the tool and stick to a 2500 mile chain replacement schedule and save $30.
Cheaper than a new cassette
If you've ever made the mistake of running your chain too long, and needing to replace your cassette as a result, then spending less than $30 on a chain checker is money well spent. Just need to remember to check your your chain regularly.
Checked a new chain against an old one with this.
Dead on accurate. A bit OCD to own but worth it.