Question about proper psi to run in aftermarket rims and tires

[Tatersalad2003]

Hey guys so I just purchased 22x10 rims with 33x12.50r22 Toyo open country at3's E load rated. And my truck calls for 55 psi up front and 45 rear and I tried that in these and it was a very very rough ride. I know with a 22" rim the ride is always going to be rougher than a setup that has more side wall, but I'm just curious for those of you that run a similar or the same size rim and tire what psi works best or what do you suggest

 

[1923bob]

I just went back for a tire rotation shop set my tires to 40

 

[Ready Go]

Here you go...

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

tiresize.com

 

[Tatersalad2003]

Here you go...

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

tiresize.com

I've tried to use this before and it's telling me to run them even higher than 55 in the front and 45 rear and that can't be right for a half ton

 

[Ready Go]

I've tried to use this before and it's telling me to run them even higher than 55 in the front and 45 rear and that can't be right for a half ton

Make sure you typed in the correct P, LT, etc tire type.

 

[1923bob]

I've tried to use this before and it's telling me to run them even higher than 55 in the front and 45 rear and that can't be right for a half ton

It tells me my max air is 80 way to high. the tire shop said 40 - 45.

 

[Sascwatch]

A larger tire will generally require less pressure as it spreads the weight out more. Keep and eye on tire wear and increase the pressure if the outside edges wear faster than the middle and less air if the middle wears out faster. And if the inner or outer edges wear differently it’s time for an alignment.

LT tires will also require more pressure than P rated tires, which is why the rebel has a recommended pressure of 55/45. If your new rims have tire pressure monitors in them you can get the tpms system recalibrated for the new pressures.

The new tires could have more plys than your old ones which would explain the rough ride with the higher pressures.

 

[Tatersalad2003]

Make sure you typed in the correct P, LT, etc tire type.

This is what it tells me "OEM Size (LT275/70R18 E) Load Capacity: 2680 lbs. @ 50 psi.

The max load capacity of the NEW tire (2270 lbs. @ 65 psi)
is below the OEM tire load capacity at 50 psi.

This means that the new tire's load rating is not high enough to match or exceed the original engineered specification for load capacity and is not recommended for use." I shouldn't need 2700lb load rating per tire for a truck that only weighs around 5000lb total though right?

 

[Scram1500]

Chalk test, takes out all the guess work