LT tires: TPMS issues?

If I go with an LT tire on stock TRD 18” wheels, will I get any issues with TPMS (running at around 75psi as opposed to 40psi)? Would I have to get any dealer programming done to set a new default low PSI warning for an LT vs P tire?

looking to get Toyo Open Country A/T2s soon—has them on a Superduty and they were fantastic in Alaskan weather.

 

There should be a button by your right knee on the dash to reset the TPMS psi thresholds. More importantly, why do you want at to run 75 psi?? 40-45 psi should be plenty.

 

You won’t have any issues with the tpms. But you will running 75 psi. There is nothing a half ton truck is capable of doing that would warrant that much air pressure.

 

My only LT experience is on a Superduty diesel with an 11K bumper pull (hence the 75psi). Can LT tires be run at a 45psi or so they need a higher pressure to properly ride/wear on highway (obviously they can be aired down off-road which is maybe 10% of my driving currently)?

 

you’ll never need to run them that high on a half ton truck. A 3/4 truck with an iron diesel block weighs a lot more than a half ton with an all aluminum motor. That high of a psi in a truck that weighs substantially less will just make it very bouncy and damn near unstable at speed. You shouldn’t need anything more than 60-65 psi for the heaviest of towing that a half ton is capable of and bumping down to 40-50 for daily driving.

I run 37/34 front/back on my LTs and have not a drop of uneven wear. I’ve gone higher and lower but this pressure feels the best for daily driving.

 

75 PSI would likely be way too much air pressure. You can figure out recommended air pressure by following the instructions I wrote up in this thread:
https://www.tundras.com/threads/how-to-determine-your-new-air-pressure-with-lt-tires.56860/

And as others have stated, the TPMS button on the dash can be used to reset the baseline air pressure. You have to inflate the new tires to their new air pressure, hold down the button for a few seconds until the light flashes, then drive or keep the ignition on for 15 mins.