Tire Pressure?

[Mark2]

Hi Guys,

I run 285/35/18 Michelin Pilot rear tires on 18" Volk SF Challenge wheels and was wondering what tire pressure I should be using for regular everyday driving?

I checked the pressure this morning and it read 24.5 psi on both rear tires. The sidewall states that the max inflation is 51 psi.

Any idea what I should be running?

Thanks,

Mark

 

[jdub]

35-45 psi is what I would run in those tires...depends on what kind of ride you can tolerate.

 

[Alec]

My uncle has Pilot Sports on his 997 turbo with the factory 19" wheels and I think it's like 41 or 42. Call Michelin, they'd know.

 

[mecevans]

probably depends on weight,power, etc of the car. might be a chart or something on their site.

 

[Mark2]

I called Michelin and they left me on hold for a long time. At first the call center person thought the Supra was a light truck. After 15 minutes on hold they told me 30 psi but I don't trust that answer as they really seemed to have no idea.

 

[BorHor]

I'd run 35-40

 

[87tomanymods]

for every day use i put 35 in everything ,any less they sqeel around tight turns. but for performance you gota just trial and error it till its neutral and launches nice.

 

[Keros]

Read up about the chaulk technique.

You put some chaulk on the sidewall and go for a spin at say... 30psi. Go through some corners, and then come back and check how much chaulk rubbed off (i.e. how far the tire rolled over). There's discussion as to how far the tire should roll over so that comes down to personal choice... regardless, short of sitting down and calculating the tire pressure mathematically with the axle loads, that's about the only real-world way to really know how your tires are performing under load vs tire pressure. There's lots of articles around the internet.

I hope that helps.

I run my Michelin Pilot Sport PS2's at about 30psi out back, 32psi up front. 245/40R17 front and 275/40R17 rear. The Supra is a tad front heavy and the fronts are slightly narrower... in theory it would take more pressure to give equal sidewall tension... I think.

 

[Alec]

I have 35psi all around in my Nexen N3000's with 18" wheels.

 

[mkIIIman089]

For every day driving, and I assume some spirited cornering now and again, just start a few psi above the stock pressure (32) and see what nets you the most even tire wear.

 

[Mark2]

Thanks for all the input guys. I inflated the rears to 35 psi and they seem better now.