Originally Posted by boubou
Max weight 2601 lbs
Max Weight of 2601 is a Load Range 114 tire.
In fact it is a 114S from the Goodyear web site.
Speed Range S equals 112 MPH.
With that basic information we are NOT done.
It must be inflated to its maximum inflation pressure cold of 44 PSI to carry that load. HOWEVER, when Passenger car tires are used on trucks and SUVs they REDUCE the maximum allowable load on the tire by a factor of 1.1; thus the maximum allowable inflation pressure is 35 PSI
which equates to a maximum load of 2365 pounds not 2601. (see page L-10 of the Goodyear load and inflation pressure manual.)
The Door post is a manufacturers recommendation for inflation that takes into consideration several factors in addition to maximum load. While the door post PSI will NEVER be higher than the maximum load bearing pressure; is almost always less. Sometimes a LOT less. That pressure is based primarily on RIDE factors (braking, cornering, and vehicle roll) at the curb weight of the vehicle and the OEM tires.
The single exception to the above has to do with P tires that are branded XL. In this case the following "note" applies (taken from the Tire Specification" document below).
The load-carrying capacity of P-Metric tires is rated either Standard Load or Extra Load. The load that can be carried with a maximum inflation pressure of 35psi limits standard Load tires. The load that can be carried with a maximum inflation pressure of 41 psi limits extra Load tires. An Extra Load tire (for example P235/75R15XL) will be branded with “Extra Load” as shown in the photo on this page. A Standard Load tire does not bear any special designations.
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