air pressure
some what confused here I weigh my camper and the steer axle weigh was 4320 lbs do I take the 4320 and divide it by 2 and then look up that weigh on the tire chart to see how much air I need in my ste...
Forum Discussion
Desert Captain wrote:
The same process for the rears, divide the rear axle weight by 4.
:C
That is NOT universally correct. Michelin, for example in their RV tire guide lists:
Single
Dual
For dual, it is the weight carried by BOTH tires on that side of the axle.
SO, best advice is to follow the process recommended by your tire manufacturer.
Neither way is better/worse, just different. The good news is that most tire guides are pretty well written.
And, if in doubt as to whether their recommended PSI a given load is for a single tire in the back (with duals) or weight on both tires, pretty easy to determine:
Carrying capacity of an individual tire in a dual set up is LESS than that same PSI would carry in a single location-- ALWAYS.
So, per the example in the Michelin RV tire guide, for a 275/80R22.5,100PSI will support 5780 pounds. In back (duals) both tires on a side at the same PSI will carry 10,520 (yes, less than 2X 5780).
