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RE: How safe are our tyres?
>BTW, an H rating is for 112 mph. The ZR rating refers to tires above the
>Vrating. The speed rating is molded on the tire with the load index*
>(together these represent the service index of a tire) after the size.
>ZR tires will have a W or Y in the service index and if it's a W or Y
Great report Richard. One correction. H rated is for 130mph.
112 mph is S rated I think but not sure. There are like 3 ratings in the
110 to 116 mph group. T,S and one other. Q is below that at like 89
mph??? H is 130. V is 149 etc on up the line like you said.
One question, W and Y rated tyres are still Z rated. Z is better
though as it is still unlimited?d That would make sense. So a W rated
tire is still Z rated but limited to what you said but a straight Z can be
higher? I didn't know that.
Thanks for the write-up
Also, your part on incrasing tire pressure. What pressure is that
from??? Adding 5 psi if you want to sustain 150 mph is great but add 5
psi to what, NOT the Max pressure I am assuming, that doesn't make sense.
Can you explain that a bit more. Thanks
1984 4000s quattro / modified/ awaiting Turbo Transplant.
1985 4000 quattro / Silver / Fixing it Up.
1987 4000cs quattro / Saphire Metallic Blue/ Girlfriend's
1996 A6q / Volcano / Dads Car
*****1985 5kt / PARTING OUT!