Hi,
I normally just use a penny to measure but when I used a penny to measure two michelins they were covering a small portion of lincolns head for around (2-3/32) but the tread gauge read 6/32.

The tire guy said michelins can't be measured with the penny cause of the grooves..

Anybody heard of this?

Thanks,
Mike

 

Did you measure in the same exact spot? I ask because if you look in the grooves you'll see wear bars(raised portions) that indicate 2/32 when flush with tread surface. If you measure there you will get a false measurement (-2/32).

 

BS 2/32 is 2/32. And a grooves a groove.