Tire Speed Rating Question
I'm posting this here because the speed rating of a tire seems to me to cross all lines/types of vehicles. Reading up on warranty issues/questions just now, I came across the following language ...
Forum Discussion
Francesca Knowles wrote:
Looks like my (most recent) question got lost in the shuffle...it had nothing to do with running over the max tire pressure as given on the tire sidewall. Asking your forbearance, I'd like to repeat it here in hopes of getting an answer
Thanks, I hope!pronstar wrote:
See that's the problem...
On the one hand, we're "supposed to" run ST tires at max pressure at all times.
On the other hand, we're told we can safely exceed 65 mph if we increase tire pressure.
It's a moot point when the tire pressure is already maxed out.
Someone please correct me if I'm wrong, but the way I understand that "increase the air pressure for higher speed" thing is that it refers to recommended pressure for the load as a baseline.
Taking as an example the first tire in the chart below, if installed in a position carrying 1530 pounds of weight, 40 pounds of pressure is "correct". But running it at its 50 pound maximum would allow for the higher speed.
I interpret that to mean that if one's running it at 50 pounds already, one's good for the higher speed....is that correct?
If you are at 40psi and under or at 1530 lbs you are good for max rated speed in your example. (for the LR C tire obviously)
