Tire presure for SRW with 19.5 G rated tires?
Getting conflicting advice on what TV tire pressures to run. Truck is a SRW F-350 with aftermarket Vision Hauler 19.5 x 7.5 wheels. Tires are Coopper Roadmaster 245/70-19.5 G rated at 4520 lbs. @ 110#...
Forum Discussion
You don't need a tire inflation table to tell you the proper inflation for optimum tire wear. Just use the formula that the tire companys use to create the inflation table. Take the capacity of the tire and divide it by the max PSI, that will give you the amount of load per PSI that the tire can carry. Take the load on the axle and divide by 2, take that number and divide it by the PSI number you came up with in step 1 and that will give you the optimum PSI to run in your tire for optimum tire wear.
For Example a 235/80R17 has a capacity of 3085 @ 80 PSI, So 3085/80=38.56
that is 38.56lb of capacity per PSI in the tire.
So if I was running 5500lb on my rear axle 5500/2=2750 So 2750/38.56=71.31 PSI per tire for optimum tire wear. Hope this helps.
For Example a 235/80R17 has a capacity of 3085 @ 80 PSI, So 3085/80=38.56
that is 38.56lb of capacity per PSI in the tire.
So if I was running 5500lb on my rear axle 5500/2=2750 So 2750/38.56=71.31 PSI per tire for optimum tire wear. Hope this helps.
