[MTWRX2002]

Whats up guys. Had my WRX for about a month now and I know I committed a sin but I didn't check the tire pressure for about the first 2 weeks. When I did it was at 45lbs up front and 42 in the rear. I moved it back to factory 32f 29r and and I'm not sure if I like it. What is yalls take on best pressure for everyday driving with a few sharp turns thrown in a day?

 

[XJman]

I ran mine at the factory spec on the door panel.

 

[Doctor Jeff]

Yep factory spec. You'll get used to it.

 

[Stanley Yahtzee]

the tires claim 51psi max, is there ever a situation when you would want them to be at 51?

 

[WRX John]

Tires are extensively tested during development of a new model, specifically in conjunction with the entire suspension system, all safety systems, and so much more. Other than professional racers who have specific tire pressure expertise, I am a believe that the rest of us should start with the factory door-jamb-recommended pressures, and only then should we slowly adjust/.measure/evaluate how the changed pressures work or do not work for us, then leave them at a new/best level.

In summary, I have stuck with the OEM recomemended tire pressures and found them to work best on my 2017 WRX.

 

[XJman]

the tires claim 51psi max, is there ever a situation when you would want them to be at 51?

Depending on the weight of the vehicle. Every tire has a load range the closer you are to the top of that range the more pressure the tire will need.

 

[MTWRX2002]

Thanks guys, Im just going to have to build trust with it again because it feels so different!

 

[rqjoe]

I run mine at 40psi. But just because I like the way the stiffer tire feels PLUS it gives higher mpg. I certainly would not go any lower than factory spec.

 

[XJman]

I run mine at 40psi. But just because I like the way the stiffer tire feels PLUS it gives higher mpg. I certainly would not go any lower than factory spec.

It’s got to feel like you are riding on concrete wheels.

 

[rqjoe]

I notice a difference from the 32 they were at.......but not 'concrete wheels' difference. The dang car is so stiff as it is, the change in ride is there but minor.

I really like the way the higher pressure makes the car feel in the corners. Noticeably less 'give' from the sidewalls.

 

[SD_GR]

Ideally one would use the shoe polish method and/or get before/after pressure Δ measurements.

Subaru specifies (I think?) 220kPa front for the bugeye but I run as high as 260kPa and like it.

 

[XJman]

Ideally one would use the shoe polish method and/or get before/after pressure Δ measurements.

Subaru specifies (I think?) 220kPa front for the bugeye but I run as high as 260kPa and like it.

Is this like the chalk method

 

[SD_GR]

Yes same idea.

 

[MTWRX2002]

What is the chalk method?

 

[XJman]

You put chalk on the ground or tire and drive straight over it and check the contact patch to assure you are getting the full contact of the tire

 

[MTWRX2002]

I'll have to try that

 

[MTWRX2002]

As soon as I figure out where my boost leak is ?‍♂