Meiyuan Bicycle Chain Measurement Ruler Wear Indicator Bike Parts Repair Tool

Chain "stretch" outside acceptable limits can cause major damage to your drivetrain which is expensive. This tool can help you prevent that. This tool has one flaw which is the measurements are .75 and 1.0 but the real standards set by repair experts are .5 and .75. So be guided by the outer limit of .75 so you do not get damaging wear. For example, though more expensive, the Park Tool uses the .5 and .75 reference

I bought a Park CC3.2 to check my bike's chains, but realized that it checks 0.5 and 0.75% wear. This is fine for 8+ speed chains, but for single speed up to 7 speed chains, 0.75% wear is still acceptable. This chain checker has 0.75 and 1.0%, which is a good complement to the Park. For the price, I expected shipping to be a while from China. Works great and I'd recommend!

Works tells u if your chain is good

I did not think it would be that small took bit over 2 weeks in boston

Does what it is supposed to and super cheap if you can wait 3 weeks.

Good tool to have.Works well.Rough finish of surface.

This is easy enough to use and seems to work fine