Tire pressure (psi) please.

[Frixco_240]

Hi i have 17x8 225/45/17 in the front and 17x9 245/40/17's in the back. I really dont know how much tire pressure (psi) my tires should have. i tried searching. thanks.

[Dousan_PG]

32 psi would be fine for the daily drive

[Frixco_240]

thanksssssssssss

[LB.Motoring]

It would be roughly 30~35psi

[Dousan_PG]

dont tires usually say max? ive never relaly looked at mine and too lazy to go outside.

[reaxion]

check for the label on the vehicle in question. that tells you stock tire pressure. thats what it should be set to, not what it says on the tire. usually found in the door jamb/ inside arm rest.

[seekanddestroy]

what the hell....

Did you look @ the tire?

It should say.

It would be roughly 30~35psi

:ugh: Tires only have MAX pressure listed on them.

35~ all around is fine.

[Frixco_240]

i dun have the sticker, ripped it when my car got painted. also, isnt it different if you have different tires/wheels than stock?

[LB.Motoring]

:ugh: Tires only have MAX pressure listed on them.

35~ all around is fine.


haha

IM use to reading auxiliary tires, aka trailer tires >_<

[axiomatik]

yeah, don't go by what the tire says. i always run 35 psi cold.

[slideways2004]

32-35 daily/comfertable

40 psi for a little more aggresive psi.

on luxury cars that are in good condition, you can feel tire pressure change as little as 2-3 psi

tire is listed as max. just run 35 psi b/c the manufacter recomendation is for stock tire size and load rating

[godzillarb]

Normally higher psi = more mpg and less traction, less psi = more traction and less mpg (larger contact patch with the road).

[DoriftoPnoy]

interesting. my tires don't tell me psi either. but i run 35 anyways. thot that was pretty standard. but my tires are jdm so i guess they dont post it on their tire? Toyo Trampio Vimode.

[srpowereds14]

Most tires will say a max pressure on there.

[Teambadrun]

For drift i would run around 40PS or so in the rear tyres, depending on your setup... front 32psi is fine.

[!Zar!]

It's hard to know what psi is needed to be run without knowing the tire size and if it's stretched or not. Just go with what feels right. That's why I don't go by what the car says.

But for the OP's setup, I'd suggest 35 psi and then go from there.

[Taniguchi_Is_#1]

tire pressure is pretty preferential for each driver. i use 35psi for DD, though.

[BBSilvia]

i would say 30-35, that should be good

[Gnnr]

check for the label on the vehicle in question. that tells you stock tire pressure. thats what it should be set to, not what it says on the tire. usually found in the door jamb/ inside arm rest.

No, thats for the tires that originally came on the car when it rolled off the assembly line. Look at the MAX rating on each tire on your car. Subtract about 5-8psi and pump it to that. Also, a lot depends on if its COLD or HOT PSI.

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=73&currentpage=1

[wootwoot]

the wider the tire the less pressure it needs so on the rear you will run less. I drive like a jackass so I have to run around 35-38 front otherwise my tires are shit. That would'nt be so much of a problem if I had a proper alignment for my driving style though..On the rears I still run 35min and this is on 205 fronts and 235 rears.

[ciGARRETTsRbad4u]

For daily i run 50 for gas mileage :loco:

[gotta240]

50psi=no bueno.

[seekanddestroy]

Look at the MAX rating on each tire on your car. Subtract about 5-8psi and pump it to that.


:ugh: :ugh: :ugh: :ugh: :ugh: :ugh: :ugh: :ugh: :ugh: :ugh: :ugh: :ugh:


No

[Gnnr]

uhhhhh did you read the page I linked to? :rolleyes:

[Skinner]

dang wish i woulda read this before i filled my tires up to 30psi just a few minutes ago! lol..

good info

[seekanddestroy]

uhhhhh did you read the page I linked to? :rolleyes:


I am aware of hot cold pressures, obviously you are not aware of how to inflate a tire. Reccomending 40+ psi.

[redsuns3838]

I run around 32-33 for mine. all around. for daily driving. anything 30-35 is fine for daily driving. max is usually recommended at 35

[wootwoot]

I am aware of hot cold pressures, obviously you are not aware of how to inflate a tire. Reccomending 40+ psi.


Thats what you HAVE to run if you're going to drive hard. Its track pressures.

[ronmcdon]

i keep mine at 32 all around. in the summer i have it at 28. id think the difference would be neglible if you set it at the 30-35 range.

for optimal handling dynamics, im not so sure having the same pressures for f/r would be best. I wonder what the effects would be to change the f/r tire pressures? Would having the fronts softer than the rear allow the car to rotate easier? this seems to work well with my miata, but im not so sure the same would apply for the 240.

:2f2f:

[seekanddestroy]

Thats what you HAVE to run if you're going to drive hard. Its track pressures.


Is that right? :rofl: Are you aware that at 5-8 PSI below the tires max it could easily get above max after driving hard on the track?

BTW, dont go saying, I meant 5-8psi below max after they got hot!!! You said, look at the tire and inflate them 5-8psi below max.

[wootwoot]

oooook champ.

[pbcstylez]

so is there a difference in tire pressure for stretched tires?

[wootwoot]

I think tire width is more important for pressure then anything. I can imagine needing slightly less pressure on a stretched tire because of it not wanting to roll over as much. Just play with it, it isnt that hard to tell where you are wearing on the tire

[dorkjoey240]

32 psi on my 240. but check sometimes if tire pressure is going low.

[ixfxi]

the wider the tire the less pressure it needs so on the rear you will run less. I drive like a jackass so I have to run around 35-38 front otherwise my tires are shit. That would'nt be so much of a problem if I had a proper alignment for my driving style though..On the rears I still run 35min and this is on 205 fronts and 235 rears.

wrong. larger tires require more pressure to keep them firm.

for those of you tools saying 30-35, thats 5lbs difference! tirerack has some very good articles that show what happens to a tire just by being over or under inflated by several psi.

wet performance:
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=3&currentpage=1

[wootwoot]

Why would a more wide tire need more psi? It is spreading the weight over a larger area. It has a larger volume of air thus being able to support a larger area

[overb0ost]

how about tire pressures when drifting?

25-28 psi cold?

lets say a 225 on a 9J rim.

a conservative stretch.

[DTS]

if you run a pressure difference between the front and back, say, 35 front 32 rear it will give more oversteer and off throttle rotation vs straight 35 35 or 32 32.

Also I belive there is a way if you mark your sidewall with chalk or grease then take some hard corners to see how much sidewall rollover you have, then you can adjust from there.

[overb0ost]

i would imagine the opposite effect.

less pressure in the rear, usually the more grip you have?

i would think 35 front and 32 rear would create a bit of understeer?

and can you explain off throttle rotation? i'm not familiar with that term

[rubberbiscuitt]

Also I belive there is a way if you mark your sidewall with chalk or grease then take some hard corners to see how much sidewall rollover you have, then you can adjust from there.


yes use the chaulk. NO GREASE! duh your already on the verge of traction. the chalk trick is easier to explain with a visual aid. tire rack has a write up somewhere. this (http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=58) is all i could find for a quick search.

as mentioned earlier about the door jam sticker being intended for the origional tire size, its also designed for a smooth ride.

[DTS]

i would imagine the opposite effect.

less pressure in the rear, usually the more grip you have?

i would think 35 front and 32 rear would create a bit of understeer?

and can you explain off throttle rotation? i'm not familiar with that term

Not really, oversteer can be induced with higher pressure in the rear or lower pressure,

If you run lower rear pressure it is more of a snap oversteer,

If you run higher pressure in the rear it is more of a gradual oversteer.

Off throttle rotation is when you let off the gas the back end will try and pull around into oversteer more.