The sum of four tires' maximum load ratings must exceed the maximum loaded vehicle weight ("GVWR"). In addition, sum of the maximum load ratings of two front tires and of two rear tires must exceed each axle's maximum loaded capacity ("GAWR"). Original equipment tires are designed to fulfill those conditions.
The maximum loaded vehicle weight is referred to Gross Vehicle Weight Rating (GVWR). And each axle's maximum loaded capacity is referred to Gross Axle Weight Rating (GAWR). The GVWR and each axle's GAWR are shown on the vehicle certification label located at the bottom of driver's side door pillar.
The GVWR and front and rear GAWRs are determined by not only the maximum load rating of tires but also loaded capacities of the vehicle's suspension, axles and other parts of the body.
Therefore, this means that the vehicle cannot necessarily be loaded up to the tire's maximum load rating on the tire sidewall.
Vehicle load limit - how to determine
Adverse safety consequences of overloading on handling and stopping and on
tiresPreparation tool
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Snow tires
WARNING
When installing winter tires on the Subaru Ascent, it is absolutely essential
that all four tires are identical in the following characteristics.
Size
Speed rating
Load index
Circumference
Construction type
Manufacturer
Brand and tread pattern
Level of wear
...
Installation
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