What PSI should I run on Xtreme MT2's?

Can someone just tell me what psi should i be running on a set of procomp xtreme MT2? cant find actual numbers
These are 35x12.50R20LT

 

found this in the glove box, says 30 front and 33 rear? does this seem right?

 

The glove box info is for the stock tires. The MT2 should have max load/psi info on the tire itself. A lot depends on what load range the tire is rated at. The web site for the MT2 should have recommended psi for normal everyday conditions.

 

if you read the card its not for the stock tires. A search at the procomp website only states max psi set at 65

 

Try the pressures suggested on the card, see how you like the ride and adjust accordingly.

 

My bag, It appears to be the updated card for your tires. Low 30's psi seems low for a LT tire like the MT2, but, like Wynned stated start with what's on the card and see how that works out for you.

 

Your tires are rated 3200lbs at 65 psi.
Truck weights about 6k.

3200x4= 12800
6000/12800=.47
65x.47= 30psi

 

Can't argue with the math. Well done.

 

Also hard to argue since the math equals what the paperwork suggested lol

 

This looked so awesome that I ran outside in the dark and got the info from my tires, but there seems to be some limitations...

Tires rated for 2833 lbs. @ 50 psi.
My truck is RCSB. GVWR 6800 lbs minus rated payload (cargo plus passengers) of 1520 lbs. Truck weighs 5280 lbs.

2833 * 4 = 11332
5280 / 11332 = .47
50 * .47 = 23.5

That just doesn't seem where I'd be comfortable running my tires, the information on my door jamb does say 30 psi front, 33 psi rear for the standard 18 inch wheel setup. I have factory 20 inch wheels from a Limited though, maybe that's where things go awry. Still, I don't know. What are your guys thoughts?

 

Most e-rated tires have max psi of 80. Some wide tires (like yours) max out at 65. Among those with max psi of 80, the most common psi that people run at seems to be 45 (I ran mine at 65 for a while, then 50. Now I am at 45). I would probably run around 35 on your tires. By the way, have you done the chalk test?

 

I started my range D Yokohama ATs (3200lbs at 65 psi) at 45 per the Toyota update sent out for the Rock Warrior 17s and BFG AT....tires were wearing like absolute garbage. Down in the 30-33 range and you can tell a difference in the wear, much better now.

 

I' m running at 45 psi with even wear. (Load range E, 10 ply). Chalk/imprint test can indicate over/under inflation. If I'm hauling heavy, I'll bump up accordingly. One thing to note is that factory recommendation (suggestion) is exactly that "recommendation". I agree that 35 would be a good starting point and follow up with chalk/imprint test. A lot depends on how good the tires' rubber/synthetic compound is when it comes to wear and tear too.

 

Generally speaking, you should go by the sticker affixed to the truck unless there is a "recommended" pressure indicated on the tire. What you should NOT do is to run at MAX pressure as specified on the tire, unless you are running near max tire load, in which case you are probably overloading your truck..

So, in order of preference;
1) recommended pressure as stamped on tire
2) recommended pressure as specified on vehicle sticker.
3) max pressure as specified on tire.

This is just a rule of thumb in the absence of a chalk test as mentioned by csuviper.

 

well geez, thanks for that info, ill go deflate them sunavabeeches in a bit. idk how or when the tires hit 40 front and 50 back but that TPSM is driving me nuts.

 

I ran into this issue with my Taco Pro as it came with 8 Ply tires and the door sticker called for 46psi from Toyota....rode like a brick! Searched for tables showing load ratings at various psi and found this one from Toyo Tires. Only goes down to 35psi which may be due to heat issues with the LT tires at low psi. Find your size and check to see what weight they will carry at what psi and then set at then lowest pressure you can. Do the chalk test and see if all is good and adjust up or down to make the contact patch correct. Many mfgs. run way high pressures now to try to up the mpg. My 02 Tundra shows a lower psi for the P265/70/16 stock tires than is shown for the current gen Tacos and the Tundra weighs / carries more. They used to go way low on psi for ride, now go way high for mpg. Here is the chart.

 

well i eneded up going to the dealership because the light was driving me nuts and turns out there is no sensors in the tires....WHAT!?! "yea your tires dont have sensors but you can buy them here with us at $190xtire" umm i bought the damn truck here. I just got it and you are telling me yall half assed the install?
"sir, it is very unlikely that the company we use to install our lifts and tires would send us a setup like this" WHERE IS YOUR MANAGER BECAUSE NOW YOU ARE CALLING ME A LAIR!!! Long story short im getting them installed tomorrow morning for free

 

I'm running my aftermarket tires at 40psi, and no problems. Handling and sound just like the stock tires.