Tire pressure

Just picked up the new truck, the ride was little bouncing. The tires seemed hard. Checked the door label for proper pressure at cold and it said 29psi. The truck was at 38-39psi warm. they are the stock goodyear 265/65/17. I usually run about 1-2psi over recommended on higher profile tires, and 2-3psi on low profile tires and have had perfectly even wear on several sets of tires over the years. Usually that extra one psi on the front pair of tires where the extra weight is from the motor. Just curious as to where others have their pressures set at.

 

With P series tires I'd keep roughly 40 PSI in the tires if I wanted good fuel mileage, closer to 35 PSI for a good ride if unloaded and as much as 45 PSI when loaded heavy. I have E rated tires on the Tacoma now. They are a stiffer tire and don't need as much air to carry the same amount of weight. I keep them at about 32 PSI unloaded, about 40 PSI loaded heavy. There is no difference in ride quality or fuel mileage compared to the older P series tires and I've always gotten 50,000+ miles out of my tires.

I'm not one to keep tires until I run the last legal amount of tread off of them. If I'm over 50,000 miles on a set of tires and winter is close I buy new tires. I'm sure I could have gotten 60,000 out of a couple of sets, but I like having good tread on mine, not the legal minimum.

 

32F, 28R cold with basically nothing in the bed.

 

Door sticker on my truck is 29 psi all around and that’s what I Run. Never load heavy. I only put about 6500 miles per year so tires never wear out. I just get new ones every five years.

 

I have stock size "P" tires at 30 psi all around.
Tried 35 psi, then 33, then 30.
Man o man does it ride hard at anything over 30 psi with nothing much in the bed.

To an extent, it depends on the specific tires and all-up weight.
But I think Toyota is right on with their recommendation.

 

LT265/75/16, 37 PSI @ 70°F

 

29 psi. All year round. Towing my camper or commuting to work, 29 psi.

 

265/75r16 (passenger rated) nitto ridge graps. I go off the placard.

 

38+ PSI on P rated tires will cause the centers to wear much faster than the edge. Ask me how I know....

 

Start with what they tell you to, and do chalk tests to arrive at your best pressure for how you load the truck.

If you are not familiar with chalk tests, Google is your friend. You want the one for tread wear, not sidewall rollover. Unless you are going to autox the truck.

 

Thanks for your replies. I think I'll set them a few pounds above specs. at 31psi in the back and 32psi in the front. As always when loaded I'll add more. The ride was way too harsh when I picked up the new truck yesterday.

 

Googled your sise, and standard load P-tire has loadindex 114 / 2600lbs At 35 psi upto 99mph.
This is even for a larger car pretty overrated, so if I calculate a safe lowest pressure for you, it will come to about 25 psi even.

For that you need to check on sidewall , and give me GAWR's front and rear.
Empty weight and GVWR would be nice to.

Once determined that comfort gets bad when real weight on tire is below 85% of weight, the pressure is calculated for.
I estimate that in your situation with 38 psi warm, so about 35 psi cold, you only have about 65% real weight of load for the pressure, so bumping expected.
But let me calculate it for you

 

I always felt 29 psi was too low for modern tires. Pumped my Taco up to 38 and am getting better gas mileage. Also with 1000 lbs in bed it is much better. Just my $.02.

 

depends on the load range, which is oddly missing from this thread, or maybe i missed it.

i run E's in stock size 265/65-17, which is an ultra-firm tire, much firmer than 270/65-17 E-range, for example. these are generally used for RV's with huge weight (Cooper AT3 LT E). i run 30 front and 29 rear cold.

 

29 psi all around all year per door sticker. I’ll take comfort over economy. I only drive about 6500 miles per year. No heavy loading.

 

GAWR F 1380KG R 1490KG
GVWR 2545KG

 

29 in the rear 30 in the front but change a little when temperature changes significantly. Stock tires have 41,000 + and are worn evenly and still have decent tread

 

I too usually stick around the OEM psi, and I went 265/75/16

 

A stiffer tire not needing as much air to carry the same load is a common misconception. I’m not sure why so many people continue to believe this myth.

https://www.nittotire.com/media/152964/TechBulletin_NTSD-12-011.pdf

I’ve talked to Michelin, Goodyear and BFGoodrich and all said their LT tires for a Tacoma are about 45-50psi. Obviously that’s a harsh ride but is required to meet load ratings.

People can run whatever they want but anything less than what they recommend puts both the tire and you at risk.

 

Yeah, but it's somewhat of a wash because people almost always go with a larger volume tire.
Also, I suspect the tire manufacturers you talked to, might not apply have applied any correction factor when going from P-metrics to LTs; P-metric load÷1.1=LT load. In our case, 2,149÷1.1=1,954

265/70/16/112(OEM tire, Offroad) @ 30 psi=2,149 lbs=
LT265/70/16 @ 39 psi=1,964 lbs
LT265/70/17 @ 37 psi=1,964 lbs
LT265/75/16 @ 37 psi=1,986 lbs
LT285/75/16 @ 31 psi=1,978 lbs
LT285/70/17 @ 32 psi=1,991 lbs
LT255/85/16 @ 36 psi=1,958 lbs
LT235/85/16 @ 43 psi=1,966 lbs

The above list would look more in line with what you were told if no correction factor is applied;
LT265/70/16 @ 45 psi=2,170 lbs
LT265/75/16 @ 42 psi=2,172 lbs
LT265/70/17 @ 43 psi=2,183 lbs
LT285/75/16 @ 36 psi=2,172 lbs
LT285/70/17 @ 37 psi=2,189 lbs
LT255/85/16 @ 42 psi=2,182 lbs
LT235/85/16 @ 49 psi=2,170 lbs