Follow manual and fill to 29 PSI or listen to mechanic?

What brand of air should I use? And should I stick with atmospheric or go synthetic? Thanks in advance.

 

Go with Rollease synthetic air, you will notice a difference, its even better than that nitrogen stuff

 

A lot of great posts already, so I’m not gonna beat the horse on it - rather share my experience/reasoning.

First off, I’m on 35s
I set them at 30psi cold. I don’t daily my truck. It’s a 2017 with 19,2xx miles. Strictly fishing/camping/whenever I need a truck kinda thing.
When I go fishing/camping - most times I’m driving 80 ish miles just to get to the trail. By the time I enter the trail, 30psi now turned into 35 due to heat building up. I can’t offroad my load range 35 @ 35psi - bounces like a damn pogo stick and the volcanic rock just chews the tires.
So I deflate them down to 20, do my thing and refill before returning home. Been having nice even wear for the last 2 years on them

30psi cold on my tires nets me about 20mpg in town, 17 ish highway when going camping with weight. (Also geared and tuned)

 

Air is your problem. Use hydrogen. Be sure to change your decal to TRD Sport Hindenburg.

 

My '23 Trail states on the door jamb to run 30 psi in the tires (seems low, but that is what the sticker says)

Just got back from my first service and the dealer's sheet says 35 psi...

Does anyone know what is correct?

 

Go by door jamb if running stock tires.

 

I just had mine serviced at Toyota, they put 36psi in all 4. 30psi does seem low and when its cold here I get low tire pressure readings if set at the 30 recommended PSI.

 

Thanks, I'll go by door jamb but prob run 32

So 35-36 seems like the norm for dealer psi's, frustrating they can't align with the manfacturer

 

I keep my tire pressures at 40 psi and I measure the tread depth across the width of the tire every time I rotate them with my Mitutoyo digital caliper's depth gauge and wear is just about dead even across the tread. If anything, the sides are one or two tenths of a millimeter less deep than the center, but that's pretty damned even. This is with the stock rims and 265 tires on the OR. A narrower rim in relationship to the tire tread width or putting a wider tire on the stock rim would change all that. The only way to know is to actually measure them yourself every five thousand miles and track if there is any abnormal wear trend going on. At the same time you can extrapolate from your measurements approximately when you'll need to replace your tires. Also measure the thickness of the front brake pads at the same time as well to track that wear.

 

Do a chalk test. Be sure to do it cold. Best with 43% nitrogen, 26% oxygen, the rest hydrogen. Each tire will be different, so test each one. Test in various scenarios (you alone, passenger, dog, tools, full tank, near empty, etc) so that you can adjust tire pressure for each load situation. Be sure to account for the 1PSI change for each 10F temperature change - morning pressure should be adjusted versus afternoon pressure.

 

The person that works on your vehicle no matter at dealership, or any other place is usually not a technician or mechanic. They're a laborer that has been shown the basics for oil changes and tire work. They're only as good as what and who taught them. They usually pump too much air into tires and tighten lug nuts tighter than spec. I always check both and other things after a "service". I loosen all lug nuts then torque to spec with a torque wrench. Re-torque after a few miles of driving. Check tire air pressure when cool with a good gauge. Numbers on door jamb are a good starting point. Adjust to your liking. 40psi on most tires is way too high.

 

Google tire pressure chalk test

 

I have 285/70/17 Nitto Grapplers. I used to have them in the low to mid 30's but wanted a bit stiffer ride so I recently increased the pressure to 40. It's too early to tell if the tires are wearing any differently, but so far it looks even. And the avg mpg has gone up a bit.

 

With stock tires (stock meaning stock size, stock load rating), run what the sticker says. Stock for you is 265/70R16, so 30 psi. If you changed to P265/70R16, you would want 27. It's not solely based on size.

The dealer did what they did because they aren't going to be bothered to adhere to a strict psi, they're gonna probably follow some sort of general guideline that all trucks get 35, or something like that.

if the door jamb says 30 and you're going by the door jamb, why would you run 32?

 

I put 36 in mine...

 

There is a tire reset button on the dash to fix that. You air the tires up to where they should be, then you do the reset and it programs the computer to learn wher they are so that it will set off the light if the pressure goes too low from that point. Meaning you'd fix the light being on at 30.

But again, like stated earlier, the correct pressure depends on the exact size and load you're running.

 

Well you are correct about better milage, but wrong about tire life. And hard tires can make a truck squirrely to drive. I suppose you could get used to driving a truck that wanders all over, but why?

I inflate mine to 35 because I like the slightly better milage, but I don't jack them up to the point they don't have a footprint that can grip the road properly.

 

Door jamb pressures are specific to the tires that came on your truck. SR, Pro, Limited, etc. with different tires would have different pressures on the door jamb. Those are the pressures Toyota used to pass all the federal handling / emergency lane change tests at GVWR. That is of course too many variations for lube techs to keep track, so they're probably instructed to "fill all truck and SUV tires to 35 psi" or something, which is still more diligence than 90% of Toyota owners would do.

 

The door sticker says 29 PSI, the max on the sidewall varies, but somewhere around 40-50 PSI is on most standard tires. ANYWHERE between those 2 are fine. Experiment and see what works best for you.

If you're not towing or carrying heavy loads closer to 29 will give you the best ride. If you're hauling heavy, closer to what is on the tire is best. Since I don't want to have to air up my tires before hauling a load I find a middle ground. Usually somewhere between 35-40 PSI. I have no problem with the ride and a bit more air will help a little with fuel mileage. In low traction situations lowering PSI down to 29 PSI or even lower helps. I wouldn't drive on pavement below the minimum 29 PSI. Off road 15 PSI or lower is sometimes helpful.

The only thing you have to be aware of is if you choose to use E rated tires. The number on the sidewall of those is 80 PSI. That is way more than you'd ever need in a Tacoma. In fact, the wheels on light duty trucks are only rated for around 60 PSI. If using E rated tires I still use the same 35-40 PSI that I do with standard tires.