I used to think chain checkers were a gimmick until I measured 0.75 on a customer's bike

Vera Ramirez · 2026-10-10T03:05:05.655924+00:00

I always told folks to just eyeball the chain stretch by pulling it off the front ring, and it worked fine for my own bikes. Then last Tuesday a guy brought in a Trek with only 1,100 miles on it and my Park CC-3.2 dropped right in, meaning his cassette and chainrings were already toast. Now I'm wondering how many drivetrains I cost people by not just buying the $12 tool sooner.

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I used to think chain checkers were a gimmick until I measured 0.75 on a customer's bike | Bicycle Mechanics - Vivisector