After Market Tire Pressure
08-03-2018, 11:13 AM
#11
Senior Member
Thread Starter
Drewter52
what are you confused about?
what did nitto tell you to run?
https://m.nittotire.com/contact-us/
what are you confused about?
what did nitto tell you to run?
https://m.nittotire.com/contact-us/
08-03-2018, 01:42 PM
#13
As stated above, there's no one right answer. 40 psi give-or-take should be about right. I generally run mine between 38 and 40.
The reason there's different opinions is because people set them at various PSI's depending on what kind of performance they're looking for. Higher PSI = better fuel mileage but harsher ride. Lower PSI = more comfortable ride but slightly less fuel mileage, and they heat up faster. Some people change the PSI frequently based on what they're doing. For everyday driving, I keep mine around 38 for good compromise between comfort and fuel mileage. If I'm going on a long highway trip, I might bump up to 40 or 42. Off-roading on the weekends, drop it down much more. Really depends on what you want out of them, as far as comfort, MPG, etc.
The reason there's different opinions is because people set them at various PSI's depending on what kind of performance they're looking for. Higher PSI = better fuel mileage but harsher ride. Lower PSI = more comfortable ride but slightly less fuel mileage, and they heat up faster. Some people change the PSI frequently based on what they're doing. For everyday driving, I keep mine around 38 for good compromise between comfort and fuel mileage. If I'm going on a long highway trip, I might bump up to 40 or 42. Off-roading on the weekends, drop it down much more. Really depends on what you want out of them, as far as comfort, MPG, etc.
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Drewter52 (08-06-2018)
08-03-2018, 10:08 PM
#14
Senior Member
When going from "P" series tires to LT tires you often need LESS air pressure to accomplish the same thing. I'd start at the suggested air pressure on the door jamb and experiment.
The chalk test will tell you what you need to know. Air them up a little more than you think you'll need and use a piece of chalk to draw lines across all 4 tires treads in multiple places. Go for a short drive, 1/2 mile of or so. If there is chalk still showing on the edges that means they aren't in contact with the ground because there is too much air in the tires. Reduce air pressure and repeat until you are getting all 4 tires running with full contact with the pavement. No chalk should be showing. You will probably find different air pressures are needed for the front and back axle's. When towing, or hauling heavy you probably need to go up some.
Many "E" rated tires are rated for as much as 85 PSI in the tires. But 1/2 ton wheels aren't rated for that much air pressure. You'll probably never need over 50 PSI even loaded heavy.
The chalk test will tell you what you need to know. Air them up a little more than you think you'll need and use a piece of chalk to draw lines across all 4 tires treads in multiple places. Go for a short drive, 1/2 mile of or so. If there is chalk still showing on the edges that means they aren't in contact with the ground because there is too much air in the tires. Reduce air pressure and repeat until you are getting all 4 tires running with full contact with the pavement. No chalk should be showing. You will probably find different air pressures are needed for the front and back axle's. When towing, or hauling heavy you probably need to go up some.
Many "E" rated tires are rated for as much as 85 PSI in the tires. But 1/2 ton wheels aren't rated for that much air pressure. You'll probably never need over 50 PSI even loaded heavy.
08-06-2018, 10:48 AM
#15
Senior Member
Thread Starter
Thank you all for the responses. Went up into the mountains and was running about ~38PSI cold. Much different ride than the 55PSI the tire place originally installed...
08-06-2018, 10:49 AM
#16
55..?
damn
damn
08-28-2018, 09:33 AM
#18
Did nitto get back to you?
All,
So I have the 35x12.5R18 NITTO Trail grapplers on my truck.
Stock door jam says to run stock tires at 35psi.
How ow do I find what I should run these aftermarket tires at??? Side wall of tires say max Cold PSI is 65 which in my understanding is if I am ever towing anything they need to be at minimum 65?
Can someone shed shed some light on this? Anyone have experience on doing this? Or is there a magic number?
So I have the 35x12.5R18 NITTO Trail grapplers on my truck.
Stock door jam says to run stock tires at 35psi.
How ow do I find what I should run these aftermarket tires at??? Side wall of tires say max Cold PSI is 65 which in my understanding is if I am ever towing anything they need to be at minimum 65?
Can someone shed shed some light on this? Anyone have experience on doing this? Or is there a magic number?