Just wondering what other people run their stock tire sizes at? I run my fronts at a little over 30 psi. The sticker on the door says 30, but isn't that just a recomendation? I am running 225's on the rear now and put them at about 34 psi. I think it helps, maybe its just my imagination.

Different brands of tires (as well as different sizes) require different pressures. While 32psi seems to be the "norm", I've seen tire pressure requirements as low as 25psi and as high as 50psi for the same size tire.

Dave

I did run 32PSI in my '84, with P185/80R13's, bumped them up to 35PSI (max for the tire), and my gas mileage went from 35MPG to 38MPG for my daily driving.

------------------
Details on my 1984 Fiero 2M4 Sport Coupe #1192 Here
Long live the Duke!! 2.5L Upgrade coming soon I hope.
1986 Fiero 2M4 Coupe, 2.5L 5-Speed
Member of the Edmonto Fiero Club

Rate me if you want!

I use 35 psi.

I find any less and I get the shoulders scrubbed.

I use 35 on my Olds tires too. They are 16X155.

The Fiero tires are stock

------------------
Arn Brown, 1985 Fiero GT, 15.474 ET stock
Mods underway.

I've always ran about 2-3 pounds under in the front and about 5-6 punds over in the back, helps in the tire longevity area all the weight is on the back end so if you think about it the tire will be under the same amount of pressure if you go my route.

yes, depends on the tire. I got different front & rear tires
33-35 front
37-40 rear
my rears make the car feel squishy if they get under 35, and my front are like rubber coated rocks over 35

I am running 44 psi with Dunlop Sport A2s. That is the max pressure for the tire.

My car seems a little twitchy. I am also running KYBs and poly bushings and will be installing a fierostore anti-roll bar on the front. I have been thinking about lowering the pressure to see what happens. If you have the same suspension pm your best tire pressue setup to me. Thanks

------------------

87 SE, Tech IV, Auto.

[This message has been edited by RACE (edited 12-30-2003).]

I have never understood how they rate the tire pressure. They say 30 lbs front 30 lbs rear. It just don't make sense. The rear is heavier. Same way with my Van It says 35 front 35 rear. The engine is up front. The only thing that I can think of is the fact that the manufacture is rating the tire pressure as if the vehicle is fully loaded.
Don

quote Originally posted by Monkeyman: Different brands of tires (as well as different sizes) require different pressures. While 32psi seems to be the "norm", I've seen tire pressure requirements as low as 25psi and as high as 50psi for the same size tire. Dave

The rating on the tire is the max that the tire can hold, not the recomended preasure. The recomended preasure is what is in the door of the car, that is the vehicle rating. If the tire will not hold the recomended vehicle rating, get better tires. If the tire can hold more than the vehicle rating, only fill them to the vehicle rating. It is almost always wrong to have the tire max preasure in the tires (about the only exception to this would be a pickup with a very heavy load in the bed).

With that said, sometimes bumping or dropping the preasure can sometimes help with handling, depending on your driving habits.