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[911r]

Hello all, went to go fill my tires up with air before a road trip tomorrow when I realized I had no idea what to fill them too. I've heard 36psi? Hoping you guys could provide me suggestions.

Not tracking anytime soon, mainly highway driving. 275/35r18 Michelin Pilot Sport 4s' squared.

[roastbeef]

36 should be good.

[slcook54]

I typically just do the factory recommendation on the driver door sill. 35 F / 36 R

[Mimmer]

I mess around between 35-37... but pretty much same through year overall

My factors are weather conditions
When cold ... I feel a tad higher psi feels better usually 37 rears and 35.5 -36 fronts.

When warmer or hot 35-36. Fronts, rears 36-36.5

I live in WA and it's more on the cold side usually 40-50ish until summer. And summer here don't rest get past 70ish average with a few hot days past 80 for few weeks usually ....

I don't think .5 psi matters so much ... I did try 38 rears on 35/275 but idk felt to bouncy or rough? 37 below felt more grippy and balances? Maybe it's all mental lol.

Just my 2cents

[pbonsalb]

I find that I wear more in the centers if I inflate to stock spec of 35/35 on my wider than stock summer tires and wheels. I use 32-33 psi.

[derbo]

For handling:

Take it from Craig Watkins (former Porsche Flying Lizard Motorsports):

The factory door jams is the best case for fuel economy and lowering it about 10% from that is a good medium if you are just the one person in the car all the time for handling purposes.

He mentions this in Ross Bentley's speed secrets podcast.

https://speedsecrets.com/166-craig-w...cars-handling/

Food for thought

[911r]

Originally Posted by derbo

For handling:

Take it from Craig Watkins (former Porsche Flying Lizard Motorsports):

The factory door jams is the best case for fuel economy and lowering it about 10% from that is a good medium if you are just the one person in the car all the time for handling purposes.

He mentions this in Ross Bentley's speed secrets podcast.

https://speedsecrets.com/166-craig-w...cars-handling/

Food for thought

Fascinating—I'll have to get that a listen. Will definitely give that a try; OEM spec for highway / street driving, -10% for canyons & track.