What PSI Your Tyres Are

[CTR Coupe]

i run
38psi-40psi all round

[defect]

put mine on 32psi all round.

[BC8]

geez, 40 psi guys ?
im running on 30 PSI on my dc2 vtir on 15 inch 195/15/55R
is that a bit too low?
im a daily driver to work and about.
Travel through motorway everyday as well
whats ur advice guys?

[newmski]

geez, 40 psi guys ?
im running on 30 PSI on my dc2 vtir on 15 inch 195/15/55R
is that a bit too low?
im a daily driver to work and about.
Travel through motorway everyday as well
whats ur advice guys?

people running 40 psi will have low profile tyres on 16+ rims
for you i would recommend more though than 30
34f 32r

[ACTI0NMAN-1]

i run 40 psi on my 15". Go to any advanced driving course and they will quote the same.
38-40 psi.

[Spunkymonkey]

Run 38 on my 205/40/17 dunlops... have tried 36, 34....usually when I have the stock rims on I run 32

[krogoth]

people running 40 psi will have low profile tyres on 16+ rims
for you i would recommend more though than 30
34f 32r

so far this is the only sane tyre pressure i have seen on this thread

i also go with 34f 32r, as told by my tyre specialist wen i got my new tyres a month ago

im running 205/45 17 all round, thats low profile, and still im not running 40 psi, thats crazy talk

40 psi cold, expands to at least 45psi or more under prolonged driving....as the temperature goes up

a typical tyre has a max pressure of around 54psi, 45psi isnt far off, kinda risky i reckon, and shit ass traction

a pressure that high is good in the rain, not so good on the dry roads

i run 40 psi on my 15". Go to any advanced driving course and they will quote the same.
38-40 psi.

a driving course, exactly

u dont go out and drive the same way u do on the normal roads as u do on a driving course,

the reason they increase ur tyre pressure on a driving course, like defensive driving or skid pan, is to increase the chance for loss of traction, making it easier to lose control, and they want u to lost control so u can practice how to deal with difficult situations

and again a higher pressure is good for wet conditions, with a wet track, a high tyre pressure would be an advantage

[SiReal]

higher pressure would mean less tyre to surface contact, hence not as effective for the wet. this runs along the same reason as to why draggers lower their psi before they run, so more rubber touches the ground.

too high a tyre pressure will wear the middle of your tyre out, increase understeer, and give u a firmer ride.

too low a tyre pressyure will wear the sides of your tyre, decrease understeer, most likely increase road noise, but give u a softer ride

this has been tried and tested by myself.

krogoth makes some VERY valid points however i dont agree with the last couple of lines.

edit: oh and i drive a 01 accordf with stock 15" rims on 65 profile. i used ot have it on 38F 35R, but found that when i put my new sway bar in, there was too much understeer. I lowered it to 33F 33R and it grips better, does not tyre squeel as easily.

[krogoth]

ahh thanx for the correction sireal

i thought if tyre pressure was higher in rain it would grip better, as ther is less chance of aquaplaning

but lower pressure means more tyre/surface grip, so i guess that is better in the rain

but i wondered why they raise the tyre pressure fron low 30z to around 40 in skid pan??

[akusuma]

Hey,

how about for standard tyres? From what I read from the tyres guide pressures on the driver side door is to use 220kpa or 32 fsi. Should I stick to that or just increase it a bit to like 34fsi since I didn't see anyone here using 32fsi for both front and rear.
It is for daily driving

[krogoth]

34f 32r

the engine is in the front, makes for a heavier front

i think 34 front, and 32 rear, means ur car is less likely to understeer , IMO

[EuroAccord13]

The reason we run higher Psi on the tyres on the track or twisties is to strengthen the sidewalls due to the stress when doing hard cornering..

The general rule is to leave like a 25% window, say a tyre's maximum Psi load is 60Psi, the 25% window will be 45 - 60 Psi... So that 15 Psi range is where you will experiment and find out which Psi in that range will allow you to perform at it's best.. After that, you fine tune it to like 1-2 Psi range... Takes some work but heck, it's good for cars with no suspension mods!


As for road use, just follow manufacturer's recommendation... BUT it is not the determining factor to good tyre life... Another rule of the thumb is when you driving on a highway or if you are carrying heavy load in the car, add another 4Psi.....

I run mine 35F and 34R as a daily driver, 22-25F on drag strips depending on conditions... 50Psi for sideways action!