I thought the speed rating was in the tire size portion? For example 255x40 ZR (Z) would be 150mph? Then that leads me to believe that most tires that have above 150+ would be a Y or W speed rating then. Is that correct?
Z in the size indicates that it's good for 149+ as you mentioned but it doesn't tell the whole story because the true speed ratings W, Y, and (Y) all indicate speeds over that same 149+ so to answer your question yes either W, Y, or (Y) should be the indicated speed rating on a tire with Z in the size. The Z in the tire size is good indicator for a quick look purposes for someone that doesn't know tires but always go off the speed rating letter next to the tire size to get the true rating. W- up to 168mph Y-up to 186mph (Y)-up to 186 and greater mph Hope this clears up any questions.
I thought the speed rating was in the tire size portion? For example 255x40 ZR (Z) would be 150mph? Then that leads me to believe that most tires that have above 150+ would be a Y or W speed rating then. Is that correct?
Z in the size indicates that it's good for 149+ as you mentioned but it doesn't tell the whole story because the true speed ratings W, Y, and (Y) all indicate speeds over that same 149+ so to answer your question yes either W, Y, or (Y) should be the indicated speed rating on a tire with Z in the size. The Z in the tire size is good indicator for a quick look purposes for someone that doesn't know tires but always go off the speed rating letter next to the tire size to get the true rating.
W- up to 168mph
Y-up to 186mph
(Y)-up to 186 and greater mph
Hope this clears up any questions.
@@natemarcy3939 Gotcha ok, yup it does thank you man.