Wheel capacity vs tire capacity

Old-Biscuit wrote:

covered wagon wrote:

Kayteg1 wrote:
I have seen factory rims splitting without alleged overloading, but I take it as occasional design error.
Steel rims usually can take much more than ratings.
With alu alloy it is harder to predict.

Alcoa wheels being that they are forged not cast are stronger than steel wheels. I'm on 16 inch Alcoas rated at 3750 each.

I'm on 16" Steel wheels rated at 3750#

Doesn't mean I would run a higher load rated tire

Wheels need to be load rated/psi rated to same (or higher) as tires load/psi ratings.

PSI rating is indeed important to be compatible but loads are only an issue if you plan on carrying the rated load for the tire instead of the wheel. A tire rated for a heavier load will provide a safer situation when run at the wheels max load then a tire rated for the wheels max load does.

In my case the aftermarket tires are rated a bit higher then my OEM wheels but they also require much less PSI (65 vs 80) to carry the wheels rated load, so less stress on both wheel and tire.