Originally Posted by BarbaraG
So, I found the measured weights (in lbs) for the four corners of my RV:
RF 2950 RR 5150
LF 3000 LR 5300
My tires are Goodyear 245/70R19.5
According to the table, in Single configuration they should be at 80 psi for 3640 lbs, and in Dual configuration they should be at 80 psi for 3415 (there are no values listed below these). I assume the Dual values are per tire, for which I'm at a max of 2650 lbs. Based on this, I think I should go back to the 82 psi they were originally set at.
Of course, these weights were a year ago, but at least they give me a ballpark idea. Looks like I need to find a place to get the weights done again.
Thanks again for the guidance.
2014 FR3 30DS
At the bottom of page 6/45 of next pdf of Goodyear I found 2 times your sises with stange differences.
The maximum loads and minimum pressure of 80 psi tels me its the G load/F-load list in wich Dual is only 1 li step lower ten Single.
In the H-load list beneath that its 2LI steps lower, wich is the system used .
already warned Goodyear a while ago for that to my opinion mistake.
So its better to get the tire data from the sidewall, still dont know now if you have F- G- or H-load tires . Search for LRG ( H or F).
Or search for something like "maximum load single 4540 lbs AT 110 psi ( cold) " and see if for Dual load its the same as in the list of Goodyear.
Also try to detemine the Speedcode , most likely for these tires N=max speed of 140km/87m/h.
For the moment I will not go from your given data so single maxload 4540 lbs AT 110 psi, And the dual load calculated lower 7.5% , but from H-load Single maxload 4940 lbs AT 120 psi, because it will give the highest psi as answer.
Asuming your rear to be dual load so 4 tires on 1 axle, if its tandem axle let me know.
First filled in part 1 for the tires and 4 tires on 1 axle , and part 3 for given 4 point weighing, then read the axle load there and filled it in part 2 and made picture of the complete page .
It shows that 80 psi is more then enaugh and then still reserve , but calculated for probably N speedrated. If I calculate the maxload for Q speedrated only to give lesser deflection with still no bumping, the answer would be F 83 psi and R 79 psi , so maximum needed pressure with still acceptable comfort and gripp , and maximum reserve.
Here the picture with the advice assuming N speedrated tires and no reduction for lesser deflection.
If you give the corrected data I will re-calculate, but it shows that 100 psi is absolutely not needed.