Originally Posted By: badtlc
Originally Posted By: slacktide_bitog
The pressure spec is the same for any tire of that size
I assumed as much but I thought maybe speed and temperature ratings might have different stiffness to the sidewall. I wasn't sure if a stiffer sidewall would require a lower PSI level to prevent increased center tread wear and vice versa.
Actually, sidewall stiffness is
NOT related to speed or temperature ratings - except to say that higher speed rated tires tend towards higher handling and therefore tend to have a stiffer sidewall. That is not to say that lower speed rated tires can not have stiff sidewalls. Those 2 things are not cause and effect sorts of things.
Further, tire manufacturers spend a lot of time trying to get their tires to wear evenly in spite of those things that cause uneven wear, but sidewall stiffness, speed ratings, temperature rating, traction ratings, and wear ratings are not among those things that affect EVENNESS of wear. This is a footprint geometry kind of thing.
Originally Posted By: jadatis
Temperature rating is only to be compared for the same brand and series of tires, so I once read. ......
Sorry, but speed ratings, temperature ratings, traction ratings, and wear ratings are all based on standardized tests and
CAN be compared to each other.
- HOWEVER -
That is not to say that sometimes tire manufacturers won't under rate their tires as there is no law against doing that. For example, a tire manufacturer MIGHT want to rate their best wearing tire 25% better than their next best wearing tire, and since they can't artificially boost the better one's ratings, they'll lower the other one.