Quote:
Originally Posted by Daschicken
75 PSI is a lot of pressure.
|
I stick with my above assertion; it's practically nothing to the steel or aluminum of your wheel.
I have a portable air tank for inflating tires. It's maybe 16 gauge, and holds 100psi with no issue.
My propane tanks are not much thicker, and have to be able to withstand 300+ psi, or else they would rupture if they sat out in the sun.
A wheel is made of much thicker steel than either. You're not going to be able to put in enough pressure as to be able to warp or spread the metal and make the tire pop off or any such thing.
Light truck wheels aren't particularly any more stout(based on weight) than an equivalent passenger car's of the same size. Weigh a couple some time.
Even if the tire could handle 75psi, I doubt there's much to gain past a certain point. I wouldn't want to put up with the harsh ride that would give me. To each their own.
If you need reassuring, there are videos on youtube where people get tires to explode by pumping in more and more air...it's always the tire that gives way, never the wheel.
Oh, and, at a guess, the additional mass of the heavier tire will probably end up costing you more fuel than you save from the tiny difference in aero, unless you drive purely highway or have regen braking to absorb the excess power needed to rotate the additional mass. Lighter rims will help, but the farther out the mass is, the harder it is to accelerate...you'd still be losing out, over-all, even if the combination was the same weight.
That's my take on it. Have fun with your quest.