Quote:
Originally Posted by Supermario
Not sure if its been mentioned before Reg, I've seen tire guys underground using a tread depth gauge in those cut outs to measure and keep track of tire wear. I think that's the only purpose? or maybe also just a part of the tire making process?
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That would be the only reason for it in my mind but I'm no tire guy. Makes sense that it would otherwise be difficult to gauge wear without it on a smooth tire.