I, too, refused to buy a chain checker that didn’t account for roller wear/size. Too many stories of those things failing new chains. I bought a 6” ruler and 12” ruler instead.
Without taking the chain off, I had great difficulty using the 12” ruler. I assume you’re supposed to measure the chain under tension, so I tried to measure the upper drive portion of the chain. I couldn’t really fit the 12” ruler in there. So I tried the 6”. If my math isn’t wrong, 0.5% of 6” is 0.03 inches. 1/4 of 1/8”. How am I supposed to eyeball that? And how do I know I haven’t just positioned my ruler wrong? Heck, even with the chain off, 1/16” seems mighty hard to eyeball. Maybe I’m not doing it right. And if I’m being honest, I’ve compared rulers before and definitely seen ones that were off by that amount across 12”.
Anyway, I bought the CC4. Glad a skeptic like me is having a good experience. I’ve yet to use it
Last edited by smashndash; 02-25-20 at 04:44 PM.