The latest 2021 Chevy Silverado HD and GMC Sierra HD will come fitted with Dynapro MT2 tires sized at LT275/70R18. The rubber is a new option for the 2021 model year, and comes tagged with RPO ...

After 20,000 miles, and with Chevy’s rotation recommendation followed, all four tires measured 10/32. So we've lost more than half of the tires’ effective tread life.