Truck tires vs RV tires on a Class A
I need to get two tires for the front of our RV. It is a Class A, diesel pusher. We drive about 5000 miles/yr. Are we okay, especially from a safety perspective, buying truck tires rather than RV t...
Forum Discussion
cbr46 wrote:
Tire Load Limits at various Cold Inflation Pressures
Bridgestone Truck 245/70R19.5
Pressure Listed is the Minimum for the Load
SINGLE
psi lb
70
75
80 - - 3525 - - 71%
85 - - 3750 - - 76%
90 - - 3860 - - 78%
95 - - 4080 - - 83%
100 - - 4300 - - 87%
105 - - 4410 - - 89%
110 - - 4540 - - 92%
115 - - 4805 - - 97%
120 - - 4940 - - 100%
If you had a tire rated for Speed Index J (62 mph) is there a way to (safely lol) exceed that speed by increasing tire pressure above actual load.
Example - Say there is 4,000 lbs on a wheel, which would call for 95 psi from the table above . . . . but that tire is only rated for 62 mph. Can the pressure be increased to 105 psi (arbitrarily picked) and gain another 10 mph without the tire flying apart?
BTW - Those Bridgestones from the table are rated for 75 mph.
Best,
- c bob
