Which PSI rating to go by
Okay, so now I'm confused. When airing up tires on trucks for towing, do ya go by the sidewall PSI or door data label? I always thought the door label was lower and yet sidewall says max "X" pounds at...
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And just to clear up a point.
A bit of overinflation doesn't have a great effect on tire wear. There are other things that have a much greater effect - like wheel position, alignment, and aggressive driving.
So over-inflating the tires a little (say 5 psi) on a tow truck isn't going to ruin a set of tires.
And just for the record, RWD vehicles (and I don't know of any trucks towing a trailer that aren't!) wear the shoulders on the front tires and the centers on the rears. That's just the way it works and I would advise against adjusting the pressure to try to change that.
A bit of overinflation doesn't have a great effect on tire wear. There are other things that have a much greater effect - like wheel position, alignment, and aggressive driving.
So over-inflating the tires a little (say 5 psi) on a tow truck isn't going to ruin a set of tires.
And just for the record, RWD vehicles (and I don't know of any trucks towing a trailer that aren't!) wear the shoulders on the front tires and the centers on the rears. That's just the way it works and I would advise against adjusting the pressure to try to change that.
