A recent example. I bought new tires at a warehouse store. About a week later, I got a low tire pressure indicator. 29 psi on one tire, 30 on the other three. They should be at 35 psi per the placard on the drivers door. How did they loose so much air so quickly? Then I looked up at the sticker on the window. It noted the tires had been filled to 32 psi.
35 psi is maximum pressure. I never go with the maximum except for on a truck if I know I’ll be hauling near the maximum load rating of the tires. Any given tire can also fit many vehicles that weigh different amounts. You don’t need as high a pressure on a 1500lb vehicle as you do a 3000lb vehicle.
I’ve got 10 ply AT/MT tires on our half ton truck. Their max pressure is 80psi but if I put that much pressure in them, it would bounce all over our gravel roads, especially the rear with nothing in the bed. Max load is 3,000lb for each tire. That’s 6,000lbs per axle. The entire truck only weighs 4,400lbs and the rear axle weight is way less than half of that. Maybe 1,700lbs sitting on a pair of tires rated at 6,000lbs.
I run 35 on the back and 43 on the front. I only buy the 10 ply tires because they last longer on the gravel roads. The closest grocery store is 18 miles away with 13 of them being gravel.
Tires do tend to loose a little pressure in the Fall and Winter due to the lower temperatures.
how much pay are these people making?....our society diminishes the contributions of blue collared workers every chance they get, so its no wonder some of these workers don’t take pride in what they do...
Technicians don’t follow the manufacturer’s tire pressure recommendations. It’s annoying.
You might be surprised to find out that there could be a fair amount of tire pressure variance in different gauges or tire pressure maintenance systems. If they are checked with a gauge, well...some of those gauges are old & could be inaccurate.