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Opps.... just re-rad your post.... don't guess that helped.
its ok man i was just curious what it actually stands for if it stands for anything at all but i am glad you no (or did ur research) what it means cuz i didnt no exactly the mph it can with-hold but all of it is interestin. if anyone posts a reply to my threads they are always helping me. thanks man. i am glad someone out there knows what it is.
It Means you can go Nice and Fast without worrying about a blowout. *Nails are exempt*
__________________ ApocalypseM6 z/28: A Few Stickers:400hp
College student Wishing For CCW505's + 383 stroker"these cars were meant to be driven by young women or raped by real men. they're too cheap to get any real respect."
Z is the speed rating. R stands for radial. Y and W rated tires will also have ZR in the numbers because Z was believed to be the highest possible speed rating. Then the W and Y's came out. So for whatever reason they leave the ZR in there.
When they created the original ratings Z was the highest and nobody thought that street cars would end up with tires that needed anything better. When the newer cars needed tires to handle speeds better than "149+" they broke the Z category down with W and Y. Street cars probably won't need street tires with ratings significantly above 186mph so perhaps this rating system will stay safe.