DOT requires wear indicators on all tires. more (archive)
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Posted by WarCamp on November 26, 2000 at 22:28:17:
In Reply to: when do I need to replace the tires? posted by Joe on November 26, 2000 at 20:51:53:
(posted from: ppp-207-193-11-185.hstntx.swbell.net (207.193.11.185))
Thest are small 'ridges INSIDE the groves of the tread. As the tire wears down these 'ridges come closer to the outside.When the wear bars are even with the outside of the tread, the tire is no longer DOT approved and de cops can write you up without any fancy measuring devices.
Look for the wear bars and you will find them, I bet.
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