Tire pressure calculation for minimum safe pressure?

[Drew99GT]

Came across this webpage that uses a hand calculated method for finding correct tire pressure.

https://www.motortrend.com/how-to/1801-the-pressure-where-should-you-run-your-tires

What are your thoughts? Is it safe to use?

This is in regards to my Bridgestone Turanza Everdrive post about ride comfort!

Using this method, some tires are 35 psi while the Bridgestones are 31. This is on a CX-5 Mazda that recommends 34 psi but 34 is teeth shattering with the Bridgestones!

Thanks!

 

[CapriRacer]

First, f

Came across this webpage that uses a hand calculated method for finding correct tire pressure.

https://www.motortrend.com/how-to/1801-the-pressure-where-should-you-run-your-tires

What are your thoughts? Is it safe to use?

This is in regards to my Bridgestone Turanza Everdrive post about ride comfort!

Using this method, some tires are 35 psi while the Bridgestones are 31. This is on a CX-5 Mazda that recommends 34 psi but 34 is teeth shattering with the Bridgestones!

Thanks!

First, the article has a fundamental flaw! The max load for a Standard Load passenger car tire occurs at 35 psi for P metric tires and 250 kPa (36.3 psi) for Eurometric tires. That is different than the max pressure.

Here are the load tables for various kinds of tires: Tire Pressure. org

Notice the max pressures.

There's a bunch of other stuff there as well.

Besides, you didn't answer the questions asked How did it ride before? What are you using to measure the pressure.

Personally, I think there is something else going on. Even at 35 psi, the ride shouldn't be tooth shattering. Harsh, yes, but not that bad!

 

[Drew99GT]

It rode ok. CX-5s ride pretty firm to begin with.

I use a Milton dial gauge which is supposed to be one of the better brands.

 

[daniel327]

What are your thoughts? Is it safe to use?

I think the article was written by someone who failed at elementary school.

Consider this flawed logic and incorrect conclusion the author presents as fact:

"if you are at 20 psi and drop to 16 psi, you just increased your footprint, that is, your traction, by 20 percent".

Where's the consideration of other factors, such as tire construction, tire size, sidewall compliance, etc, etc? Where's the evidence that proves a linear relationship between tire pressure and tire footprint and overall traction for every tire?

Perhaps Barlow should stick to writing about topics relevant to her expertise, such as sucking a golf ball through a garden hose.