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recommended psi??

19K views 20 replies 14 participants last post by  somick  
#1 ·
well i just got new wheels and tires and i checked my tire pressure yesterday. they have 35psi in them. the bridgestone website specs say they have a maximum psi of 44. is 35 too low? they are potenza s02-a 215/45/18 btw. also fogive me if there is already an existing thread about this, but my internet is not working at home and my time online is very limited atm.
 
#11 ·
This is a formula I have posted before - this is geared more towards a performance ride

Tire Pressure

(Vehicle Weight in lb/100) + 2 psi at heavier end + 2 psi all around if suspension and alignment are stock.

Example: Stock 911, 3,000 lb.
(3000/100) = 30 psi
Add 2 psi all around = 32 psi
Add 2 psi to heavy end = 34 psi at rear
With modified suspension, the result is 30 psi front, 32 psi rear.

"There is no 'golden' tire pressure"

The optimal setting depends on the individual driver and his preferences.



This is around where I run my pressure.

Camry SE I4 = roughly 3100lbs - (I rounded DOWN)
Front wheel drive assumes the front is the heavier end
Stock suspension

3100/100 = 31
+2 PSI for stock sus = 33
+2 PSI on heavy end = 35 front and 33 rear

My tires seem to be wearing ok.

I am not sure what impact a lower sidewall has on the forumla.
 
#13 ·
I fix tires all day at work. I usually put in maximum recommended pressure on the sidewall. The reason is that i know i am probably not going to see that vehicle again for months and moreover, chances are that absolutely NO-ONe is going to bother to check the tire pressure until the next scheduled maintenance (5 months). And it is fact that even a tire in perfect condition loses about 1 lb a month.

If you really, really hate to check your tire pressure, this is one approach you can use. If you check it more often, anything in the range 32-36 ought to be fine, exactly as all the other people are saying. The only reason to change tire pressure is if you see tire wear showing under or overinflation. (Underinflation = sides more worn, over-inflation= center more worn)
 
#14 ·
I fix tires all day at work. I usually put in maximum recommended pressure on the sidewall.

If you really, really hate to check your tire pressure, this is one approach you can use.
Why aren't I surprised that you would do that????????????????
 
#16 ·
Actually, what I usually do for lower profile tires is put a higher psi then stock of course. For a 45 profile on 18" wheels, I'd recommend at least 38-40 psi. You shouldn't use the stock PSI settings because you aren't using stock wheels anymore.
 
#19 ·
What tire is this? and what is its max psi rating? Reason I ask is that I am running a 225/50/18 all-seasons and have 38psi as well with 44 as max rating, and thinking of upping to 40psi or even higher... improved ride (lower rolling resistance) and improved mpg...