Tire pressures
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Senior User
Joined: Mar 2016
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Tire pressures
Now that I've found ForScan and can set my TPMS when the adapter gets here and I learn the software, I'm wondering what other might have experienced related to running different tire pressures.
I found a Michelin inflation chart, and running the LTX AT2, I would be within specs at 35psi on rears (figuring 3500lbs on rear axle) and 50psi on front(5000lbs front axle). Not that I'd go that low, but it is within spec. I live on a pretty rough piece of road and really notice a reduction in bounce after dropping my pressures and taking a spin. It felt real good at 60F/50R.
I'd like to minimize wear, while reducing the empty bounce. Does anyone have any practical experience they could share?
I found a Michelin inflation chart, and running the LTX AT2, I would be within specs at 35psi on rears (figuring 3500lbs on rear axle) and 50psi on front(5000lbs front axle). Not that I'd go that low, but it is within spec. I live on a pretty rough piece of road and really notice a reduction in bounce after dropping my pressures and taking a spin. It felt real good at 60F/50R.
I'd like to minimize wear, while reducing the empty bounce. Does anyone have any practical experience they could share?
Token Redneck
Joined: Jun 2007
Posts: 9,335
Likes: 343
From: Breckenridge, TX
So long as the math check outs (which is does, since you checked the tables), go old school and chalk test the tires. Rub a line of sidewalk chalk across the tread, roll forward a dozen feet or so and look how it comes off. Lower the pressure until it wears evenly.
I don't go under half tire pressure regardless of what the inflation table says, and if the tires feel squirmy I'll up the pressure some (shouldn't be an issue in a stock size). I'd weight the truck too, a scale ticket is $11 where I am and it's good solid info to start with.
55/40 is probably a good starting place to check.
I don't go under half tire pressure regardless of what the inflation table says, and if the tires feel squirmy I'll up the pressure some (shouldn't be an issue in a stock size). I'd weight the truck too, a scale ticket is $11 where I am and it's good solid info to start with.
55/40 is probably a good starting place to check.
Senior User
Joined: Jul 2014
Posts: 263
Likes: 2
From: Rural Sumter Co. Georgia
Last week I lowered all tires to 50psi. It definitely rides better but one night in the NC mountains it got cool and low pressure warning light came on. I raised the pressure to at least 55 to 60psi. Warning light would not reset.
Dealer said you have to reset all tires to recommended pressure (in my case 65psi) to reset the light. You can then lower the tire pressure again to the desired level as long as you don't go below Ford's minimum. I need to see if the sensors can be adjusted to a lower sensitivity.
The ride quality change is greatly appreciated on the rougher NFS roads. I was chagrinned to endure an especially rough road for several miles only to find a Dodge minivan and a Honda Civic parked at the end though!
Some you lose and some are rained out.
Dealer said you have to reset all tires to recommended pressure (in my case 65psi) to reset the light. You can then lower the tire pressure again to the desired level as long as you don't go below Ford's minimum. I need to see if the sensors can be adjusted to a lower sensitivity.
The ride quality change is greatly appreciated on the rougher NFS roads. I was chagrinned to endure an especially rough road for several miles only to find a Dodge minivan and a Honda Civic parked at the end though!
Some you lose and some are rained out.
Thread Starter
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Senior User
Joined: Mar 2016
Posts: 166
Likes: 1
So long as the math check outs (which is does, since you checked the tables), go old school and chalk test the tires. Rub a line of sidewalk chalk across the tread, roll forward a dozen feet or so and look how it comes off. Lower the pressure until it wears evenly.
I don't go under half tire pressure regardless of what the inflation table says, and if the tires feel squirmy I'll up the pressure some (shouldn't be an issue in a stock size). I'd weight the truck too, a scale ticket is $11 where I am and it's good solid info to start with.
55/40 is probably a good starting place to check.
I don't go under half tire pressure regardless of what the inflation table says, and if the tires feel squirmy I'll up the pressure some (shouldn't be an issue in a stock size). I'd weight the truck too, a scale ticket is $11 where I am and it's good solid info to start with.
55/40 is probably a good starting place to check.
Thanks for the input guys.
For anyone who is interested and is running 20" Michelin LTX AT2, this is the max load/inflation info directly from Michelin:
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