PSI for 35x12.5r18

Looked everywhere and on different forums can’t get a straight answer . Running 35x12.5r18 Load F Falken Wildpeaks AT3W on a 23 TRD Pro. What is the recommended psi for the tires for best ride ?

 

I run my BFG KO 33” at around 45 also. More air creates a rougher ride. Look over on the previous gen or the wheel forum. There is wealth of info.

 

Got it that’s what I figured . Discount Tire inflated them to 32 psi . I was thinking that was way too low .

 

You still got oem tires?

 

No got after market 35s

 

Probably. Depends on some tires.

I have 3 load range C's in my garage and all of them show the max load rating at different pressures. The Goodyear Territoty MT's I just got for my truck are 2535 lbs at 35 psi. The KO2's that are currently on my truck are 2535 at 45 psi. Then KO2's on my Lexus GX are 2755 at 50 psi.

 

Should have said. Do you still have take off tires. Would you like to sale them ?

 

Sorry I literally just sold them yesterday with 100 miles on for $200 for the set

 

Per Falken website, the max pressure (PSI cold) is 80.

 

1. Let the chalk tell you
   You can also “calculate” your tire pressure with the chalk method. This involves coloring a section of your tire with chalk to see how much tread is making contact with the ground. Start by finding a flat road surface. Concrete is actually the best choice, but you can also do this on asphalt. Make a mark with soft chalk that goes all the way across your tread. Then, gradually drive your truck forward about 50 feet and then backwards 50 feet.
   
   Analyze the chalk on the tire. If the chalk is only worn off on the center of the tire, reduce the tire pressure slightly and go through the process again. With the adjustment, you should see the chalk wear off more broadly. Keep making tiny adjustments in the tire pressure until the chalk wears off evenly and all the way across the tread.
   
   You will have to complete this process for each of your four tires. Once you’ve found the right street pressure, add 10% to all four tires. Then, measure the tires and add pressure to balance them. As explained above, you need to measure from the wheel to the ground. Start by balancing the profiles of the front tires with each other. Then, balance the front tires again with the rear tires. Always adjust the tires with the smaller profiles by adding air.
   
   The advantages and disadvantages of this method are the same as those involved in the second method above. If you go through the process correctly, you end up with the ideal tire pressure. But, this method is tedious and there’s a reasonable chance that you will make a mistake.
   

 

This will almost always say to use 35psi for most larger tires. The chalk test (as mentioned above) will also indicate about 35-38psi is correct for a 6000lb truck. If you had a static load like a camper this would be different. PSIs like 50-60 (exact same tire) are meant for situations like a one ton truck weighing 7500lbs hauling up to 3000lbs of cargo. Over inflation will result in the middle part of the tire wearing out and a harsh ride.

 

Go do a chalk test and tell us what you find. Will be a good data point!

 

I dont love that site because they dont always have the right numbers. They insist a LT315/70R17 C range should only be inflated to 35 psi even though my sidewalls clearly state 2535 @ 45 psi.



I ran mine at 37 PSI because that was what was on the F150 Raptor door sticker and is what these tires are from. They wore like absolute garbage in the rear.

 

What is the max inflation pressure and load rating on your sidewall? 65 psi or 80 psi?

I had load range D 37x12.5R17 Geolandars and they were rated for 3525 lbs load at only 50 psi. I had to run them below 30 for the tread to even be close to flat on the ground.

 

Def do not run them at 80psi cold that is max press with max hauling load on truck or towing max weight. Run them at 40psi and you will be fine. Talked to tire manufacturer and did the chalk test. 40 psi for E/F load rated tires is perfect and gives a good ride. It’s def not to low of a pressure. I have the wear on the tire to prove it. It was perfect! Good luck!

 

Thanks ! Had more issues with balancing was about to start washing the truck and noticed the balancing weights had slid off over the rim . Dropped it off at discount hopefully they can get it fixed now .

 

Yea they will get it right for you
Good thing you saw it!

 

Told you it was the balance !! Ask the for one of the senior techs to perform the balance. Mine initially was down by one of the young bucks, and they did not leave it right.
For testing purposes I got my truck up to triple digits and it rode buttery smooth.

I’ve had Discount tire drop the ball. As a matter of fact this time they installed the tire on my SR5, they damaged my wheels. They are going to call me to schedule an appointment to get my wheels fixed.

Be sure to check your wheels for any scratches or marks.