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think this is a little high or no?
35x12.5. Don't know if tire size matters for psi.
 

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View attachment 2069 think this is a little high or no?
35x12.5. Don't know if tire size matters for psi.
Not enough info to give a valid response. Brands/models of tires have different sidewall thickness, stiffness, etc. and vary in load ratings and tire pressures for those load ratings. Each maker provides a chart or table for its tires for load and tire pressure.

This post is something I would have expected from qcguy. Maybe he hacked your account?
 

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Discussion Starter #6
Not enough info to give a valid response. Brands/models of tires have different sidewall thickness, stiffness, etc. and vary in load ratings and tire pressures for those load ratings. Each maker provides a chart or table for its tires for load and tire pressure.

This post is something I would have expected from qcguy. Maybe he hacked your account?
They're circular and black. Toyo at2
 

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Clearly you do, so you win. Doesn't change the fact that you asked a seemingly random question without enough information to provide an intelligent answer.
 

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I run my 35x12.5x20's at 53 cold. They warm up to about 57 to 58 psi. If your running 60 psi cold then I would drop them down a little.
Just my opinion.
Bill
 

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I run my 35x12.5x20's at 53 cold. They warm up to about 57 to 58 psi. If your running 60 psi cold then I would drop them down a little.
Just my opinion.
Bill
Bill,

I just pulled these off the Toyo web site.

The first line is our stock tire, the 285/70r17. Recommended pressure is 55psi, and from the load table it shows Ram is expecting a load of 2900 lbs.

2nd line is for the 315/70r17 (about 34.5x12.5). Toyo recommends 45psi for that tire at the same load.

If you switch to a 20" wheel, it changes again a bit (3rd line). The load rating of 2900 falls between 45psi and 50psi, probably 47psi. (The 315/60r20 is very close to the 12.5x35r20.)
upload_2016-6-27_17-50-16.png


Then I pulled the flotation numbers for 35x12.5 on both 17" and 20" wheels. Here they are. Note that they're slighly different from the numbers above. Toyo recommendations for the same 2900lb load looks to be 48psi for the 17" and 45psi for the 20".
upload_2016-6-27_17-50-33.png


You can see that moving from a 17" wheel to a 20" wheel, the tire change increases load by a fair amount at 60 psi, about 400 lbs per tire, 1600 lbs for the whole truck. Not sure how it will wear compared to the recommended load / pressure range.
 
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