Quote:
Originally Posted by eZAK
So here is some more fuel for for the fire:
According to American Wheels, Tire Guys, and several forums;
The 'Max PSI' found on the back side of most all rims is there for the installer only and it indicates the maximum air pressure required to seat the bead on the tire!
Further more, two different rim mfg.. have stated that they know of no rim failure do to over inflation pressure. Tire failure Yes, rim failure No
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The maximum PSI inflation pressure allowed for installers when seating tire beads is 40 PSI.
Never exceed the maximum pressure and/or load capacity of the rim/wheel.
The above statements are established tire industry standards.
Current FMVSS standards do not require wheels to have load and PSI values displayed on them. However, most OEM providers request those values be molded on the wheel to help them insure they are using the correct wheel specifications for OE fitments.
Wheel manufacturers are required to provide wheel specifications on request. They are also required to insure wheels they build have the manufacturers name and model number on each individual wheel they manufacturer.
Some wheel manufacturers will only provide wheel load capacities. When that happens the installer cannot inflate the wheel to a PSI value higher than what is necessary to meet the maximum load capacity of the wheel. Manufacturers that provide both load capacity and recommended inflation pressures on their wheels are saying the maximums should never be exceeded.
If in doubt you will find most of the information above in the USTMA or FMVSS standards. They are easily found by searching the WWW.