Stop using "one-size-fits-all" tire pressures - a science based guide to the right tire pressure

[parb]

I wrote this guide after seeing a bunch of nonsensical statements made in offroad videos on YouTube.
For the best ride and traction, your pressure must be calculated based on vehicle weight and tire volume, not just what's printed on your door jamb.

Why it matters:

• Pneumatic Springs: Correct PSI allows tires to absorb high-frequency energy, saving your suspension and making the ride MUCH better
• Load vs. Volume: A 35" tire needs less dense air than a 33" to carry the same weight -sounds counter intuitive but it is true
• Precision: I’ve crunched the load-inflation math so you don’t have to.

I’ve included a cheat sheet table for common sizes (34s, 35s, etc.) and specific settings for highway, rock, sand, and snow.

Check out the full guide and the cheat sheet here: The Science of Tire Pressure

 

[Dokatd]

I wrote this guide after seeing a bunch of nonsensical statements made in offroad videos on YouTube.
For the best ride and traction, your pressure must be calculated based on vehicle weight and tire volume, not just what's printed on your door jamb.

Why it matters:

• Pneumatic Springs: Correct PSI allows tires to absorb high-frequency energy, saving your suspension and making the ride MUCH better
• Load vs. Volume: A 35" tire needs less dense air than a 33" to carry the same weight -sounds counter intuitive but it is true
• Precision: I’ve crunched the load-inflation math so you don’t have to.

I’ve included a cheat sheet table for common sizes (34s, 35s, etc.) and specific settings for highway, rock, sand, and snow.

Check out the full guide and the cheat sheet here: The Science of Tire Pressure

Good education or reminder!! This has bugged me for decades. The worst is the guy who airs up to max pressure of the tire.

I use chalk or even sometimes spray paint to get as close as possible to best possible street wear.

Sometimes the manufacturer will publish a rolling radius target. That's helpful too.

 

[parb]

I should mention that you need to adjust the pressure with the seasons. The tables are fixed and based on weight but you lose or gain 1 psi for every 10 degrees F change. This do vary a but based on how you drive but i would just adjust with the seasons for let's say every 20 pr 30 degrees temperature change

 

[Dokatd]

I should mention that you need to adjust the pressure with the seasons. The tables are fixed and based on weight but you lose or gain 1 psi for every 10 degrees F change. This do vary a but based on how you drive but i would just adjust with the seasons for let's say every 20 pr 30 degrees temperature change

If you don't mention it then the Grenadier TPMS will certainly do it. So frustrating here in Texas since we have such huge daily swings.

 

[parb]

Yeah, i think those on high altitude or desert conditions with cold nights and hot days are having a bit of a bother. Its a bit unfortunate that they made the temp change from set point to alert a fixed interval, i think it's too narrow.

I also find it really annoying that off-road mode doesn't mute the tpms pressure alert. I'm pretty much always aired down when I'm in off-road mode.