Actually many tires can be run WELL above their ratings, just remember the speed you can go decreases along with the weight capacity of the tire when it is run above its rating. (I say this in regard to sustainable operation not one time use)
If you have a city only driver (aka under 50mph) with a light car (well under tire weight rating) you can usually inflate most 2 ply sidewall tires to 60-65PSI (note I don't recommend this, it is possible that it can result in premature blowouts if you hit one too many big bumps, also if you do this on tires that aren't new you might possibly explode one in your face, never happened to me but I'm told it can happen) Also remember as you increase pressure the sidewalls will weather check
exponentially faster.
Many tires like spacesavers as an example aren't always constructed better they just have different weight and speed ratings to make up for the pressure increase. (though I've found 3ply sidewalls on space savers make them very durable if you happen to have a vehicle that accepts the size)
I will definately agree with whats been said, no MAJOR advancements have been made in tires, just creatively changing the ratings and wear profiles, Ooh repackaging is always fun.
Good Luck
Ryan
Quote:
Originally Posted by TEiN
How much difference do you think it makes that the tires in this test are all rated at only 32 psi, yet, all current tires in this size (215/75x15) are rated at higher pressures? Although a few are rated at 35 psi, the majority are at 44 psi, some at 50 psi, and some at 65 psi. I'm no tire engineer, but these pressure rating differences say to me that some advances may have been made in tires since this test was conducted, and the results may not necessarily apply to the tires that are available today.
 |