Indulge me for a sec. Curb Weight and Tire Pressures?

So I’ve been trying to do a little research and haven’t found exactly what it is I’m looking for. I know there’s usually a lot of knowledge on TW so here goes.

My DCLB 2016 Tacoma TRD OR is quite PORTLY. I threw it on the scales today and was surprised at how much weight I’ve actually added. She now tips the scales at 6480 lbs! Yep. I’ve added 2000 lbs to this beast. But I digress. I’m now running 35x12.50R17 inch tires which are load range E.

I know that the door placard tells me put 30 psi in stock configuration and obviously that's no longer correct. So how do I figure what psi I should actually be running now with the added weight and oversized tires? I tried to find charts online to tell me but nothing was very helpful. Obviously I want to get as much tread-life as possible considering the changes I’ve made.

 

Chalk test.

Google or YouTube will show you how to do it.

 

Yep chalk test it. I run 34 PSI on my 33s.

 

Very easy:

Measure tire tread width
Wet an area several feet long in front of the truck.
Drive through the water
Measure the wet tire track width.

If it is too narrow, you have too much pressure. If it is too wide, you have too little tire pressure.

You will not have to get it down to the exact psi, as there will be a range of several psi that will be acceptable.

This is just a modified version of the chalk test.

Best results will be had if you go through the water while turning. This will keep the rear tire track from running over the front tire track which could skew resultant tire track.

 

I run 35psi on my 285/70/17 Toyo MTs. I'd imagine you'd be right around 35-37psi. Hell on my H1 running a 38.5 inch tire on a 17 inch wheel I'm 38-40psi cold.

 

2000 pounds? Yikes...

 

You probably have a good 100lbs per corner in tires. I wouldn't count that in the curb weight only because your suspension doesn't care about the weight of the tires that it sits on. Your drive train does but I don't think the drive train is the limiting factor in the curb weight.

 

Based on the picture in the OP, you're definitely running too high.

 

Chalk test really oughta be a sticky

 

Wow! That's a lot of plasti dip!

 

On road call gladiator with the weight measurements. They will likely have you run them too high.

Off road based on trail conditions.

 

I've been running 40 psi on my load range e Goodyear Duratracs. 20,000 miles on them with an even 13/32 left on all 4. Rotated every 5000 miles. Hope that helps. However I'm at 5100 pounds. Chalk test may be best.

 

If you would indulge me for a minute-maybe these other guys already know what you have on your truck but I don't. What all do you have added-on that equals an extra 2000lbs? That's crazy!

 

It blows my mind how people can't even be bothered by doubling the maximum rated capacity of their trucks around here.

 

Doesn’t it differ between 6-ply and 10-ply? Like 35psi for 6-ply and 50-60psi for 10-ply is typical?

 

Check out my build page.

Front and Rear Bumpers (steel)
Winch
Sliders (steel)
Skid Plates (steel)
Roof Racks (partial steel)
Topper
Truck Vault
Fridge with Dropbox Slide
Recovery Gear
It all adds up...

 

It’s not like I’m still running stock suspension.

The motor and trans are good for it...

 

Chalk test method !!!!

 

Are your brakes upgraded?

 

I just press harder...