Originally Posted by robby363
Uniform Tire Quality Grading. Here's a better eplanation for it. Uniform Tire Quality Grading (UTQG)
So the higher the number and letter the better?
ex. 320 AA A compared to 420 AA A
Is this much different than the Z or ZR rating?
Don't want to sound dumb asking these questions but, most tire shops have no idea either.