What tire pressure should I be using ?
07-16-2007, 04:31 PM
#1
2nd Gear Member
Thread Starter
Join Date: Jul 2006
Location: St Louis
Posts: 271
What tire pressure should I be using ?
Hey guys, I switched to 18x9s, 255/45 in the front and 18x10s, 285/40 in the rears. Im not really sure what tire pressure to run. How do you know what to run ? The car had stock 17s but that was a long time ago. Thanks
07-16-2007, 05:11 PM
#4
5th Gear Member
Join Date: Apr 2007
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RE: What tire pressure should I be using ?
ORIGINAL: Sherwood06GT
It's printed on the side of the tire. Run the low end for daily driving.
It's printed on the side of the tire. Run the low end for daily driving.
i run a 295/45/18 and have it at 35.. only bc thats what i set it at 2 weeks ago when i put them all on.. but i think im going to drop them to 30.. maybe 28..
as far as the fronts.. i would say 32..
any more questions, PM for a quick answer, i work at discount tire, so im sure i can help you
GTstang
-David
07-16-2007, 08:15 PM
#6
5th Gear Member
Join Date: May 2005
Location: S.burbs Chicago
Posts: 4,793
RE: What tire pressure should I be using ?
Take note that some lower profile tires take more psi to = the load capacity of the origional tire.
Example the OE 235/55/17 at 32 psi has a load capacity of 1587lbs
the replacement 255/45/18 at 32 psi has a load capacity of 1367
The rear 285/40/18 at 32 psi has a load capacity of 1510
Now this is a standard load tire, some come in extra loads which the #'s change.
Discount Tire should be looking at door placards for proper psi. Not just a general # for cars, and a general # for trucks.
Gtstang that 295 at 35 psi has a nice hefty load rating of 1753. You could safley run that tire at 26 if you wanted to. (1587lbs)
Any questions feel free to pm me also. Working for Goodyear for 17 years.
Example the OE 235/55/17 at 32 psi has a load capacity of 1587lbs
the replacement 255/45/18 at 32 psi has a load capacity of 1367
The rear 285/40/18 at 32 psi has a load capacity of 1510
Now this is a standard load tire, some come in extra loads which the #'s change.
Discount Tire should be looking at door placards for proper psi. Not just a general # for cars, and a general # for trucks.
Gtstang that 295 at 35 psi has a nice hefty load rating of 1753. You could safley run that tire at 26 if you wanted to. (1587lbs)
Any questions feel free to pm me also. Working for Goodyear for 17 years.
07-16-2007, 08:38 PM
#7
4th Gear Member
Join Date: May 2007
Location: Utah
Posts: 1,249
RE: What tire pressure should I be using ?
ORIGINAL: GTstangB.F.D.M.
actually only the max is printed on the side of the tire.. as far as what you should run, in most cars we fill em up to 32, trucks 35.. performance cars differ, from being 33, to 39 in the rear.. all depends.. for us, bc we want to grab, (depending on how much playing aroudn you do, or more of just driving) i would say 30 in the rear for someone that plays alot.. if you only drive to work and back then i would say 35 all day long..
i run a 295/45/18 and have it at 35.. only bc thats what i set it at 2 weeks ago when i put them all on.. but i think im going to drop them to 30.. maybe 28..
as far as the fronts.. i would say 32..
any more questions, PM for a quick answer, i work at discount tire, so im sure i can help you
GTstang
-David
ORIGINAL: Sherwood06GT
It's printed on the side of the tire. Run the low end for daily driving.
It's printed on the side of the tire. Run the low end for daily driving.
i run a 295/45/18 and have it at 35.. only bc thats what i set it at 2 weeks ago when i put them all on.. but i think im going to drop them to 30.. maybe 28..
as far as the fronts.. i would say 32..
any more questions, PM for a quick answer, i work at discount tire, so im sure i can help you
GTstang
-David
felt mushy. The max tire pressure on the KDW P255/45 ZR18 is 51, max load of 1709.
Where should I really be?
07-16-2007, 08:55 PM
#8
4th Gear Member
Join Date: Apr 2007
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Posts: 1,602
RE: What tire pressure should I be using ?
I have a question about tire psi at the track.
If im using stock tires at the track 234/55/17 what should I have my psi at?
Also if im running MTs DRs at the track 275/40/17 what should I have my psi at?
If im using stock tires at the track 234/55/17 what should I have my psi at?
Also if im running MTs DRs at the track 275/40/17 what should I have my psi at?
07-16-2007, 09:12 PM
#10
5th Gear Member
Join Date: May 2005
Location: S.burbs Chicago
Posts: 4,793
RE: What tire pressure should I be using ?
ORIGINAL: white07
I have a question about tire psi at the track.
If im using stock tires at the track 234/55/17 what should I have my psi at?
Also if im running MTs DRs at the track 275/40/17 what should I have my psi at?
I have a question about tire psi at the track.
If im using stock tires at the track 234/55/17 what should I have my psi at?
Also if im running MTs DRs at the track 275/40/17 what should I have my psi at?
On the MT's I would suggest 15+ then trial and error them down a lb. each run until you find your sweet spot.
I run 13-14 psi in my DR's