Tyre pressures?

[Guest]

215/45/18.... what's the recommended pressure please?? Leggy BL5... 8)

[Guest boostin]

What does it say on the sticker on the drivers door jam?

I'd be tempted to put around 36psi in those.

[dubbedup]

 boostin said:

What does it say on the sticker on the drivers door jam?

I'd be tempted to put around 36psi in those.

sounds bout right to me...i run 34psi in all my wheels 15/18/19s

[pl0x]

i run 40ish pound in all my tyres, some people say to high but meh they seem to last...

[dubbedup]

 pl0x said:

i run 40ish pound in all my tyres, some people say to high but meh they seem to last...

how wide are your tryes, i found that when i had real wide tyres (245s) they lasted quite a bit longer with higher psi, but with the 215s they rounded the edges a bit with lots of pressure... does anyone know why this is?

[Ammon666]

Give this a read http://www.autospeed.com/cms/A_1653/article.html

I found having the difference in tyre pressures front and back reduced my understeer and also reduced wear on the outside edges.

[Guest keltik]

I run 40psi in mine. 215/40/17

Anything lower than 36psi feels sloppy, even with 40 psi the shoulders only just live as long as the center treads

I read in a couple semi reliable places that the max pressure of the tire - 15% is usually a good number

[nztintin]

i run 36 cold, 38 hot, i got alot of rubber tho....

[T.Rev]

Toyo T1Rs 36 front 34 back on v5 wagon

[pl0x]

 dubbedup']

[quote name='pl0x said:

i run 40ish pound in all my tyres, some people say to high but meh they seem to last...

/quote]

how wide are your tryes, i found that when i had real wide tyres (245s) they lasted quite a bit longer with higher psi, but with the 215s they rounded the edges a bit with lots of pressure... does anyone know why this is?

thats with pretty much any low pro tyres i have

with normal 13"'s i run 36psi

but wouldnt alot of pressure push the middle out more and stop the egdes from wearing unevenly?

[Guest DMSREX]

 T.Rev said:

Toyo T1Rs 36 front 34 back on v5 wagon

As above same model same pressures same tyre ;D

[MINTGTB]

36PSi all round for me on 215/45 R17 on my Goodyear rubber 8)

[subieboy]

 MINTGTB said:

36PSi all round for me on 215/45 R17 on my Goodyear rubber 8)

Same with mine (I think from memory I once measured it hot with digital meter and it came to 38.something PSI)

[Scoobydoo]

The last alignment and balance that Tonys tyre's did on my car, they put in 34psi on front, and 32psi in rears. This is on 225/40/18 Toyo T1R's.

[GC82GO]

Set it up like a Drift car (lol i hear flaming) , so like i have mine on 32psi front, 38psi on the rear. (Inducing oversteer, reducing understeer), Wanting the front to be a bit more flatter to grab more surface, But to low psi and sidewall will flex..(unstable). Having lower psi in the rear than the front will more than likely induce understeer as the front will break traction before the rear.

[Ammon666]

 

Set it up like a Drift car (lol i hear flaming) , so like i have mine on 32psi front, 38psi on the rear. (Inducing oversteer, reducing understeer), Wanting the front to be a bit more flatter to grab more surface, But to low psi and sidewall will flex..(unstable). Having lower psi in the rear than the front will more than likely induce understeer as the front will break traction before the rear.

I'm pretty sure that reducing front tire pressures and increasing rear tire pressures will induce major understeer especially in a subaru which already has tendency for understeer. Most of us want to reduce this so we have increased front tire pressure to improve turn-in sharpness and reduce the amount of understeer.

[GC82GO]

Sorry your right, Im living in a fantasy world (420/cut). :

[Guest]

 GC82GO said:

Set it up like a Drift car (lol i hear flaming) , so like i have mine on 32psi front, 38psi on the rear. (Inducing oversteer, reducing understeer), Wanting the front to be a bit more flatter to grab more surface, But to low psi and sidewall will flex..(unstable). Having lower psi in the rear than the front will more than likely induce understeer as the front will break traction before the rear.

Yea, try it the other way around. You'll find your cars to have much more of a tendency to oversteer with 38 F/ 32R compared to 32 F/38 R.

OP: If you are asking to find the best tyre pressures for performance I advise to experiment with the car and find somewhere where you can throw it around and find out how the varying pressures effect the cars tendency to over/understeer. Start by trying various pressures between 30-40psi F & R, etc..