What PSI Your Tyres Are

[rmalov]

hey ppl
i was wondering what psi the integra vtir and type r tyres should be on, or what people prefer and why?

[dark138]

40psi highway :D

[krogoth]

thats a bit much

i got 34psi in the front

32 in the rear

[ACTI0NMAN-1]

40 for hwy, 38 for anything else.

[VTi_b0i]

15-20 for drag racing,
35-40 for normal driving...

[PaZzMaN-R]

im running 35f 37r but it also depends on tyres. are you asking for stock tyres?

[VeeTec]

40psi all round. I'm on low profile tires also.

[proto-fenix]

I've got 17x7.5 wheels with low-profile tyres on my Integra GSi.

What PSI should I be using in the front and back?

[rikstar]

I've got 17x7.5 wheels with low-profile tyres on my Integra GSi.

What PSI should I be using in the front and back?

Low profile tires need higher pressure than standard tires. Look on your tire to see the recommended max pressure and then set it about 4-5 psi below that to allow for increase in hot weather.

I'm like VeeTec i have low profile tires and i'm currently running 38psi on all four. Try different pressures and see how your car handles and go from there.

[zco]

195/55/R15 - 40psi all round. nothing better than 600kms per tank :)

[josh t]

205/50/16 - 36psi cold all round

[AsH_]

faaarrrkkk...

thats high as compared to me...

im a daily driver at 29spi... 205/45/16

i used to have em at about 45psi...

wat should i have em at???? i got low profiles...

[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!

[Muzz]

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!


id have to disagree, you obviously dont want the tyre to be rolling/folding over during hard cornering, but once your above the tyre pressure that keeps the tyre in correct formation, adding more pressure isnt going to magicaly improve performance/grip of the tyre.

You will greatly reduce the area of the contact patch, which isnt worth the trade off for less sidewall flex, which isnt always a desirable thing in road racing anyways. You will also overwork the centre of the tyres tread.

Dont use some extremly poor rule of thumb, that seems to work against the recomended tyre pressures of most tyres, use the manurfactures actual info for the tyre.

ie, Toyo RA1

Air Pressures Recomendations:
Dry Conditions
Front Drive - Starting minimum 24 psi.
Rear Drive - Starting minimum 18 psi.
Goal - 41 to 43 psi (hot)
Wet: (heavy water layer)
Front Drive - Starting minimum 28-30 psi.
Rear Drive - Starting minimum 22-24 psi.

Front Drive - Starting minimum 18-20 psi.
Rear Drive - Starting minimum 12-14 psi.

To pump your tyres up to 45-60psi cold, and only play around in that range is crazy, track car or street car. If you want less sidewall flex use a tyre with stiffer sidewalls.

http://www.tirerack.com/about/techcenter.jsp the first 5 links are reguarding tyre pressures.

[gelo]

id have to disagree, you obviously dont want the tyre to be rolling/folding over during hard cornering, but once your above the tyre pressure that keeps the tyre in correct formation, adding more pressure isnt going to magicaly improve performance/grip of the tyre.




agreed
i personally go with 40psi cold
due to what i do with my car
at track it heats up to around ~46psi
i always make sure my chosen tyres have a max of 51

but thats just me
for people who just do daily driving
proba just have it slightly above the recommended psi

[josh t]

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.


IMO - that is not entirely true. If you compared a pressure of 40psi against 20psi in the wet, 40psi would be far better. Lower pressure in the wet means the tyre has more tendency to aquaplain, a very dangerous situation in the wet.

Similarly, drag tyres are normally lower psi because they are after a soft side wall, hence why drag tyres don't tend to be low profile, soft side wall means better grip for the launch.

Anywhere between 32psi - 40psi cold should suit most cars/wheel combo's on this forum for street use, just your personal preference where you wanna be within that range, and remember to check cold.

Track days and semi's slicks are different of course.

[Mr_will]

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.






agree 100% with all your post except this bit.

in the wet, having less tyre contact (up to a point) is desirable.

less contact means more weight on that patch of tyre, which makes it harder to aquaplane. this is one of the reasons why wider tyres are not as good in the wet - large contact patch means less force per cm^2 of rubber, thus its easier for the water to get underneath.

[josh t]

a big reason why skinny tyres are better in the wet is because the water has less distance to travel before its out of the tyre, not so much the weight on the tyre.

[roar]

i always adjust my pressures depending on what driving i'm doing..
195/50/15's

cold pressures
summer: 34F/36R
winter: 36F/38R
wet: 38F/38R

i prefer higher settings at rear as the front tyres heat up much quicker than rears so at hot operating temps the pressures equalize

[chosen_one]

ok I've read three pages of differeing opinions - all good.

What psi should I be running for 225/45 R17 Bridgestones on a factory Accord Euro Lux rim if I'm only doing daily driving and no track work etc. I stopped at a tyre place last night and they increased my tyre psi from 32 that I was running to 40. They said I was running too low. I just want good even tyre wear for daily driving. Any thoughts?
Cheers

[krogoth]

36f 34r

[DNYALL]

How about for track, wat kind of pressures do people reccomend? On street i tend to run them all at 38.

[krogoth]

im not sure, but id say lower for track

34f 32r, also depending on weather and track surface grip

coz wen ur tracking, theyll be that much more high speed and fast cornering that the tyre pressure should significantly increase after a few laps...

34f32r cold, should hit at least 40f38r after a few good hard laps

but im not sure, som1 else might have a different view

also, its about preference, some ppl feel their car handles better wen the tyres are on 40f 38r cold, and then it hits at least 48f 46r after a few hard laps

try both configurations, see how u feel....but i woodnt recommend running higher than 40f 38r cold wen goin to the track...

[chingaling]

37 front 36 rear touge runs !! 15``

[STTICH]

this kind of thread, u're likely to get some really vague answers.

tyre psi really depends on size, profiles and brands.

i have 5 sets of wheels, 5 different brands of tyres on each set, all sets running slightly different tyre pressure. :)

best way is to try it urself! everyone likes different kinda feel and handling.

[TheGoodDeal]

I always adjust my pressures to

Front: 90% of Max PSI printed on the tyres
Rear: 85% of Max PSI printed on the tyres

[beeza]

42 front,40 rear on low profile tyres.Rear a bit lower for more grip,less slidage :p