What exactly does ZR on my tire stand for?
#1
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What exactly does ZR on my tire stand for?
On the side of my tire it states 265 35 zr18 ihave always wondered what zr and xr stands for i know what it means but what does it stand for.
#2
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S -- 180km/h or 112mph
T -- 190km/h or 118mph
U -- 200km/h or 125mph
H -- 210km/h or 130mph
V -- 240km/h or 149mph
W(ZR) -- 270km/h or 168mph
Y(ZR) -- 300km/h or 186mph
ZR -- Above 300km/h or 186mph
T -- 190km/h or 118mph
U -- 200km/h or 125mph
H -- 210km/h or 130mph
V -- 240km/h or 149mph
W(ZR) -- 270km/h or 168mph
Y(ZR) -- 300km/h or 186mph
ZR -- Above 300km/h or 186mph
#4
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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.
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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.
#17
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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.