Thor Forums

[gmc]

Originally Posted by Dcowley

...data however shows the tire manufacturer to have the edge here.

Of course the tire manufacturer both marks the max cold pressure on the sidewalls - AND - publishes the load vs inflation charts...
The nice thing is you can of course follow whichever you want - or neither.

My 'mousetrap' preference:
I am not concerned about tire wear as I never expect to wear out MH tires (unlike my passenger vehicle). I expect the vast majority of us are in same position... Date expiration and dry rot happen long before tread wear.
- If I don't know the weight of rig - or am at/near max GVWR - I set to the placard weight provided by RV manufacturer.
- If I know the axle weights, I use the tire manufacturers load vs inflation chart.

For several years our travel pattern was long (snowbird) trips and I was at/near max - so ran the placarded weight.
Now with trip durations typically measured in days/weeks and not months, I carry less, and have been able to reduce pressures to match load.

Do what works for you and gives you the ride vs. tire life you want. I would only caution against running a lower pressure than the weight you are carrying requires (based on tire manufacturer data)... but above that choose what you want up to sidewall max.