Originally Posted by Happy Vibe
If the SUV came stock with P rated tires and the manufacturer says what the GCVWR is why do you need to reduce it by 9%?
It's not the vehicle capacity or GVWR that is to be reduced. It is the tire load capacity you see in tables or molded on the tire sidewall that is reduced.
Tire capacity should exceed the actual load so in your case the actual load needs to be less than (tire capacity-9%).
This is by axle when you have GAWR which should be on a certification label or you should be able to get this from your vehicle dealer.
You cannot take the total capacity of all 4 tires and compare with the total vehicle weight as the weight is not equally distributed F&R r & L
I write a blog on RV tire application and safety. RVTireSafety.com
Also give seminars on tires at RV events across the US. 40 years experience as tire design & quality engineer for major tire mfg. Freelander 23QB on Chevy chassis is my RV