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Tire Pressure PSI for 18x9 with 275/35

  • Thread starter Thread starter 01PonyGT
  • Start date Start date Jan 29, 2004

01PonyGT

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Jul 27, 2003
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Willow Grove, PA
Jan 29, 2004
#1
  • Jan 29, 2004
  • #1
What should my tire pressure be for everyday driving on the street? I have 18x9 rims with 275/35-18 at all four corners. The sticker in my glove box says 30psi front and rear, but that's for the stock 17x8 with 245/45-17. What's everyone running in their 18s??

Thanks,
WES
 

Beau

Founding Member
Jan 29, 2000
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San Diego
Jan 29, 2004
#2
  • Jan 29, 2004
  • #2
what does the tire say?
 

01PonyGT

Member
Jul 27, 2003
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Willow Grove, PA
Jan 29, 2004
#3
  • Jan 29, 2004
  • #3
1990StangLX said:
what does the tire say?
Click to expand...

The sidewall says max press is 44psi, but that's the maximum not necessarily the proper psi for every vehicle, right? Besides 44 psi would be an insanely harsh ride in a Mustang I would think.

WES
 

Beau

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Jan 29, 2004
#4
  • Jan 29, 2004
  • #4
01PonyGT said:
The sidewall says max press is 44psi, but that's the maximum not necessarily the proper psi for every vehicle, right? Besides 44 psi would be an insanely harsh ride in a Mustang I would think.

WES
Click to expand...
well i have 245/45ZR17's and they are at 35 PSI, so maybe run yours at 40 PSI?
 

01PonyGT

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Willow Grove, PA
Jan 29, 2004
#5
  • Jan 29, 2004
  • #5
1990StangLX said:
well i have 245/45ZR17's and they are at 35 PSI, so maybe run yours at 40 PSI?
Click to expand...

Thanks for the replies 1990StangLX, but I was thinking I'd actually have to put less pressure than the OEM recommended 30psi because of the lower profile/stiffer sidewall of the 18" tire. Does that sound right?? Or am I just confused? How much psi are you guys with 18s running in you tires?
WES
 

Beau

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Jan 29, 2000
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Jan 29, 2004
#6
  • Jan 29, 2004
  • #6
01PonyGT said:
Thanks for the replies 1990StangLX, but I was thinking I'd actually have to put less pressure than the OEM recommended 30psi because of the lower profile/stiffer sidewall of the 18" tire. Does that sound right?? Or am I just confused? How much psi at you guys with 18s running in you tires?
WES
Click to expand...
i see what you mean, but my thoughts were since you have a lower profile you'd have to add more air to keep that sidewall really stiff and prevent any possibility of rollover
 

wms004

Founding Member
Jan 15, 2002
2,864
2
49
Los Angeles
Jan 30, 2004
#7
  • Jan 30, 2004
  • #7
01PonyGT said:
What should my tire pressure be for everyday driving on the street? I have 18x9 rims with 275/35-18 at all four corners. The sticker in my glove box says 30psi front and rear, but that's for the stock 17x8 with 245/45-17. What's everyone running in their 18s??

Thanks,
WES
Click to expand...
I was told 35 psi when i got my tires put on my new Afs 03 cobra 18x9's about 2 weeks ago. Share some pics of your ride

-wade

 
0

007

Founding Member
Jan 29, 2002
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Jan 30, 2004
#8
  • Jan 30, 2004
  • #8
I run my 275s on the rear at 35-36PSI. The smaller BFGs on the front have such a low profile I run them at 38PSI.
 

01PonyGT

Member
Jul 27, 2003
304
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Willow Grove, PA
Jan 30, 2004
#9
  • Jan 30, 2004
  • #9
007 said:
I run my 275s on the rear at 35-36PSI. The smaller BFGs on the front have such a low profile I run them at 38PSI.
Click to expand...

Thanls for all the replies evryone. I guess I was wrong then....lower profile means more air pressure, right?


Thanks,
WES
 

01PonyGT

Member
Jul 27, 2003
304
0
16
Willow Grove, PA
Jan 30, 2004
#10
  • Jan 30, 2004
  • #10
wms004 said:
I was told 35 psi when i got my tires put on my new Afs 03 cobra 18x9's about 2 weeks ago. Share some pics of your ride

-wade
Click to expand...

I don't have any pics that are small enough for stangnet....whenever I post a pic I have to reduce it's size. I'm running out the door now for a weekend trip so I'll post some when I return.

WES
 

Marks5.0!

Founding Member
Jan 27, 2000
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San Antonio, TX
Jan 30, 2004
#11
  • Jan 30, 2004
  • #11
on my 265's i run 38 and the rear 295's i run 35
 
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