UniorPro Chain Wear Indicator (Return to Product Page)

I did not purchase this tool from BTD, but I like it so well I felt compelled to comment.

As the previous commenter noted, the tool does not have a 0.6 marking. That said, if you check your chain often, this tool lets you assess how quickly it is wearing and allows you to anticipate when you will need to replace. It�s really nice to have more information than simply go/no go.

I have a Park Chain Checker, which measures when your chain is at .50 or .75 stretch. It works. I thought it might be helpful to have a gauge that measures a wider variability, and the Unior Pro seemed to fit the bill. As stated in the description, 'most manufacturers recommend replacement at or before .6% stretch.' I want to be that guy that replaces the chain just before .6% stretch.

Here's the thing: The calibration marks shown in the description photo on the BTD site do NOT match the product I received. Photo shows calibration marks for 0; 0.2; 0.6; with remaining marks obscured. Product in my hand shows 0; 0.25; 0.75; 1.0. Consequently, if 'recommendation is: 'replace chain at or before .6,' I'm still left guessing when my chain hits 0.6 with this tool.

That said, I will say the tool is easy to use, and that the measurement appears consistent with the Park chain checker, as it measured a just over .50 stretch on my mountain bike chain, just as my Park chain checker went through at the .50 mark.