Originally Posted by
datlas
I hope you all know that it's not the rubber that gives a tire its structural integrity. It's the carcass/casing. So unless that is exposed, you should be ok.
Yea but the rubber is there to protect the casing....
If you can pinch the deflated tire and see exposed threads at the bottom of any of the cracks, then it should be replaced.
The reason is that road dirt will work down the cracks, get into into the threads and start abrading them internally.