RedRenisis

I'd like to find out the average tire pressure that everyone is running on their OEM rims, make sure you post 16's or 18's, thanks.

Im also interested in how many weights the rims have from the factory, 3 of my rims have about 6 or 7 weights, but one of them has like almost 20, is this common, build date 9/03

rx7&rx8

rims have a lot of weights to counterbalance TPMS weight. You should notice the weights are usually opposite the valve.

G8rboy

I've got 18's- 32-34 psi on the street, 30-32 psi for road trips.

Chief

18" Wheels
I believe the tires say max 45 PSI, so I have been going with 40

RotorManiac

^^i think thats too much

36psi here. manual states: increase pressure by 4 psi if you travel at high speeds, and cause i do that its 4 over the normal 32psi

Celronx

iTrader: (1)

18" wheels

51 psi max pressure printed on tires.

38.5 psi front
41 psi rear

Still trying out this set up. I just got my car last Thrusday. So far I like it. They had 32.5 front and 29.5 rear when I picked it up. It felt real "squishey" around sharp corners. I'll post if I change anything.


Cel

ChrisP

18" wheels, 32 psi all round (per the label on the door).

khtm

Does anyone have the tires that have two contradicting "max PSI" statements on them? Mine say that the max PSI is 55 but not to use more than 41 PSI. I'm not sure of the exact wording but I'm positive it says something to that effect. I even had a friend check it out since I couldn't believe it.

Anyways, I usually have them at 34 PSI.

RedRenisis

Ive been running very similar 32 up front and 30 at the rear on 18's

Murray16

I asked about this the first time I brought my car back to the dealership for an oil change. I was confused because Iread 32psi on the door but 51psi on the tire itself. My mechanic assured me that the proper inflation was 32. He scorned me for putting in 51.

RXE16T

Don't forget your tire pressure increases with heat from driving.
Its states a maximum pressure since that is the highest amount of psi the tire can handle and still perform all its duties.

Check your tire pressure in the morning after the car has been sitting stationery overnight.
Then check it again after you've driven the car whilst they are still warm.

Depending on how you drive and how long you've been driving, you'll find the psi reading to be significantly higher then when you checked it in the morning.

That is why your tire placard in the door jamb recommends a lower setting (32psi) vs the maximum setting on the tire (40, 42, 45psi, etc).
This is to allow for heat build up which will raise the tire's pressure and affect their performance.

On the standard 18s, you should be running 30-32psi.
Only set it higher if you do a lot of sustained high speed driving.

RotorManiac

^I agree. Also nitrogen helps to keep control of the heat. Tire pressures are more constant.
And I believe pressures above 36 is too much...

Chief

The info plate inside the door on my 8 doesn't have the recommended tire pressure like it is supposed to

philodox

32psi here

NavyDood

There are 2 stickers. The one on the suicide door and one on the driver door. The actual driver door is where you should find it.

G8rboy

^^^^^^^ Awesome avatar Dood! "...in a van, down by the river!"

iridearocket

Never run pressures under 32psi (on any rim size) .. unless you go to the track.
Good Z rated performance tires can be inflated at 34 to 40 psi as you choose, but you will find that the traction will be compromised as you reach pressures that are at the higher end of this range. Fuel economy, tire wear and sidewall rigidity are better with the higher pressures, but traction is compromised. Tires will grip best within a certain temperature range. The lower the pressure, the hotter the tire will be. The higher ther pressure the cooler a tire will run. You never want hot tires while travelling at at 150mph... so speed demons might want to run up to 40psi, especially when it's hot outside. As ambient temperatures become lower, you should decrease the pressure towards 32-34 becuase the rubber will need to generate more of it's own heat. 38-40 can be used in the Summer becuase the higher heat allows the rubber to grip better

If you have the sissy auto tranny with the 16" tires, then just put the factory 32 in the tire becuase you don't care enough about driving to bother with it. :p

rx8cited

18" wheels 32 PSI cold for stock summer tires per the owner's manual page 10-7 and Tire Pressure Label on the driver's side door.

Note: Since it's almost that time for some of us, SNOW TIRES should be inflated to 36 PSI cold (page 4-9 of the owner's manual says snow tires should be inflated 4.3 PSI higher than the pressue recommended on Tire Pressure Label). I confirmed the 36 PSI pressure with my sales guy Wes at the Tire Rack for my Dunlop Winter Sport M3s.

rx8cited

G8rboy

Good point- I found out last winter that makes a big difference in traction (not to mention a little more rim protection from potholes... for me at least since I run on 40 profile winter tires).