Tire pressure @ 40psi from dealer?

My manual says tire pressures should be 29 psi front, 32 rear... why did the dealership put 40 psi in all four?

 

Cuz they're tards.

 

Cuz they're tards.

 

Jinks! Lulz

 

i see your from colorado... so based on my experiences with the low-pressure warning light going on and off all winter due to the cold temps, i bet they just over-pressured them.

 

I run 34 in my mich. ltx's

 

I run 40psi. 29/32 might be nice for the ride, but 40 gets me better mpgs.

 

chris 4x4 says 34/32 is best.

idk why you would have 29 in the front more weigh at all times unless you are towing or hauling. but idk anyone that towns hauls EVERY WHERE they go.

 

The factory recommendation is based on a compromise between ride comfort, gas mileage, and handling. I suspect that 29 in front is all about cush. Way too low in my opinion.

 

Never had it happen and I've been running at or near the sidewall inflation levels for 20 years.

If sidewall max is under 50psi, I run sidewall max.

 

Couldn't tell you on the Taco because I jacked them up on the way home from the dealer, but I average 24.5 to 26.5, rolling from Chino to Burbank 5am and 3:30pm.

But I got 60k out of a set of 40k cheapies in my '91 Escort, and at 35k on my '06 Duramax 4x4 my BFG K/O's had less than 1/16th compared to the new tire that I got when one got punctured.

Also, wet traction. People mistakenly believe that a "hard" tire has poor wet traction. The opposite is true. Navy tests show that pressure is directly proportional to the speed at which hydroplaning happens.
At 28psi that speed is a little below 60mph. At 35psi that moves up to closer to 70.

 

In the "old days" the dealerships would run lower psi to allow for a smoother ride when you went for that all important test drive.

Smoother ride = greater sales.

 

And like Jiffy Lube pushing 3,000 mile oil changes, the tire manufacturers and dealers like it because it pads tire sales even though it is just like the 3000 mile oil change... it's a waste of natural resources.

But the difference is that, other than the waste of resources and money, there is no down-side to 3000 mile oil changes, but there are a number of down-sides to running lower inflation levels from both an economic and safety standpoint.

 

How accurate is your tire gauge ? Were the tires cold when you measured the air pressure ? If it a quality gauge, then reduce your tire pressure to the stock settings and reset your TPMS.
Running at a higher pressure will cause the center tread to wear excessively.
It is your truck and you can run what you want to run. My tires were not equal or at the correct air pressure also. Two of my tires were higher by 4 Pds. and two were low by 2 Pds. Things happen.

 

I run 40 all the way around on BFG All Terrains.
Got 35K on the odometer plus 15K towed behind my Class A Motor Home.
Total of 50K still have plenty of tread, no uneven wear, the trick is 5K rotation.

 

Measurements were taken cold with an above average gauge that is within one PSI of two other gauges. I consider it
an accurate enough gauge.

 

After I bought my truck, I checked and they were 28/28. I usually keep 2+/1+ over recommended PSI. Nice to know that they like to recommend this and that for the longevity of your truck, but they never bother to to do their own QC.

 

Are you talking about a new delivery or was it at the dealer for service?

When I worked at a Toyota dealership (years ago) the tires where all pumped up during the delivery process. Part of the pre delivery inspection (PDI) we to adjust the pressure spec. Maybe they still do it and maybe your inpsection wasn't done.

 

^ ^ It was a new delivery.