TPMS question

I like doing the chalk test too for even tread wear

 

He only wants you to tell him 60psi is fine. Even your video showing what I told him regarding chalk test will be ignored. 60 psi is downright dangerous in terms of its effect on the contact patch and traction.

 

My garage is in a dusty alley so I could check on it every day haha.

My E duratracs liked 28psi. Fuck tread wear, I wanted full contact.

 

I would think contact patch would be like 4" wide at 60psi, in which case those tires would burn up in a hurry.

 

OP-- You're getting some good advice in the thread. I don't have an axe to grind, so do whatever you want (I always do whatever I want to do, too). But I wouldn't be running those tires at 60psi.

 

Could you please honor my request? I haven't asked him to leave. I have asked you to leave. And it has nothing to do with the technical content of the advice.

 

I don't disagree with that, and that is not what my objection to this gentleman has to do with.

 

Gotta love your Avatar and name..

 

You can safely run those tires at 60 psi. You will have less traction, less tire life (irregular tread wear), and oddly enough you'll get better mpg (from reduced rolling resistance). The tire will never blow out on you because you ran 60 psi. And will you even tell a traction difference outside of extreme situations? Probably not. But it only takes one extreme split second to end your life or god forbid some one else's.

If you want hard printed recommendation on what tire pressure to run, you only have to look at far as your door jam. Its printed clear as day there

Tires are designed to "squat". I guarantee your light ass tacoma didnt make those tires "squat" too much.

Regarding your tpms light, sounds like they broke one, or you have a sensor in your spare tire and size/ply doesnt match. Meaning your spare has 29 like it should and the rest of the tires have 60. This will also set off the tpms light

 

E rated tires are designed for much heavier trucks and with a max load are meant to be used at 85 PSI. On a Tacoma much less air pressure is needed. Mine were at 50 PSI when I got home from the tire store and after experimenting closer to 35 PSI worked out to be the best. I was running softer P rated tires at about 38-40 PSI for the same ride. Generally speaking the stiffer E rated tires need LESS air to accomplish the same thing in a light truck.

You also have to consider what the wheels are rated for. I've never seen a P rated tire rated for more than 40-50 PSI. I do know that the wheels on 1/2 ton and smaller trucks are NOT designed for the 85 PSI rating that E rated tires are rated for. I don't know what the recommended max is, but 60 PSI may well be more than your wheels are rated for. If so there is the possibility of a wheel failure.

Regardless 60 PSI is way too much for these little trucks. I'll bet you money only the center 4-5" of your tires are in contact with the road. The outside 1-2" are off the pavement.

 

Well, I aired down to 35 psi and drove it around two or so miles. It feels like I am running on low pressure tires. It felt bad. I may send it back up to 50psi tomorrow for now. I did look at the tires where they made contact with the drive at 60 psi. I could not see evidence that the outside was off the pavement.

 

I sent them to 45 psi. It was an acceptable ride (based on ~2 miles). I'll re-assess more with a more thorough drive tomorrow. The broken TPMS sensor is a possibility.

And my pressure monitoring system might just have some real problem. The dealership topped off the pressure and rotated my Camry tires after 5,000 miles way back in '07. Tire pressure light came on and has never come off in the 150k since. Three different dealerships weren't able to fix it.

 

One thing I have to say is annoying is that the pressure gauge on my new ARB deflator appears to be way off. Had to use an old one from my Jeep days.

 

I pulled out 4 pressure gauges the other day and they all measured different pressures. I think that's common. That's why the chalk test is often used. It's the only way I know of to really ensure you're in the ball park. Once you get it dialed in, you can use your gauge and use it for relative measurements.

 

I would listen to the guys that say 60psi is too much..

You're the same guy that kinked the reservoir hoses in the ADS thread.

Not sure how much experience you have with vehicles but it seems not much. Take some advice, it'll save you in the long run.

 

I'm pretty sure the TPMS goes off of the pressure you reset at, but you also probably need to drive for a bit before the light will go off.

I say pick a pressure, hit the reset button, drive for 20 minutes and if the light is still on call the tire place. As for what pressure, I'd contact nitto and ask them regarding your specific application. 60psi seems high unless you are heavily loaded or towing near max, I'd venture you will have uneven wear running that with an empty truck.

 

Actually, there was no kink. It was in an "S" shape. And the only way I could change that (which I did) was to loosen the attachment to the reservoir. And there was no guidance on that with the shocks. Even Headstrong was hesitant to mess/offer guidance with that without talking to the manufacturer (they emphasized that there is no universal standard guidance for this and they had had disasters with shocks before). So I did that. And I got two different stories about whether it (the S shape) was OK from ADS. In the end I went with the guy who said adjust them.

 

I am definitely going to try the chalk test. The ARB gauge was ridiculously off so I think it is back to old Amazon.

 

You took them out to the trails yet? Haven't had the chance as I am waiting for tires to come in..