Question about tires
I have been learning a lot about tongue weight and payload capacity lately, but I have not even looked into tire capacity and weight rating at all. I am going to need some help with this. So my truck ...
Forum Discussion
CapriRacer and Tireman9 have both told us (for those that don't know them, both are tire engineers) for years a P metric tires max load capacity comes at 35 psi...even tho they may have a 44-51 max psi on the sidewall.
Higher pressures above 35 psi just stiffens the tires sidewall...but doesn't gain any more capacity.
And both engineers have also told us the OPs 275/55-20" tires has a 113T load rating/2535 lb capacity = a P tire. P tires on a truck are required to have their load rating derated by dividing its capacity 1.1 = 2304 lbs capacity. Still w/i a 1/2 ton trucks rear axle ratings.
Pump those P tires on the trucks rear axle to the max sidewall when towing...or carrying max loads.
Higher pressures above 35 psi just stiffens the tires sidewall...but doesn't gain any more capacity.
And both engineers have also told us the OPs 275/55-20" tires has a 113T load rating/2535 lb capacity = a P tire. P tires on a truck are required to have their load rating derated by dividing its capacity 1.1 = 2304 lbs capacity. Still w/i a 1/2 ton trucks rear axle ratings.
Pump those P tires on the trucks rear axle to the max sidewall when towing...or carrying max loads.
