What's the std tyre pressure for 320 with 205/60/15 tyres?

[tomstickland]

I pumped them all up to 32psi last night. They seemed to be at around 26psi before I upped them. I used to run my fwd Astra on 32psi and sticky tyres. Just wondering if too much pressure might have not helped the crappy tyres that are on the car with regard to grip levels.

[smithy318i]

there is a sticker you can check
open your drivers door and look at the pillar on the left!

[Simon13]

the tyres are supposed to be 205/55/15 your rolling road diameter is too big! 60 profile tyres for 14 inch wheels. 32psi is fine though. Check the tyre and it will say the maximum rating it can take

[tomstickland]

Thanks. Just had a look. The 205/60/15s aren't listed. But either 2.3 or 2.1 bar, so let's say 2.1 bar which is about 29.5psi.

[Jhonno]

tbh - i run 32psi all round with 205/55/15's and find it better than the standard pressure which i found made it a bit too tail happy

[tomstickland]

The tyres came on the car, you can thank the previous owner for them. So 205/55/15s are the way to go? What about fitting my spare 195/55/15s. That'll bring the rolling radius down a bit more.

[Jhonno]

205/55 is correct size yeah.. but if you got them tyres sitting about then why not, not the correct size but will be much better

[orangecurry]

205/55/15 new tyres will have a diameter of 606.5mm

195/55/15 are too small at 595.5, but as a tyre wears you can lose up to 14mm so they'll be like part-worn 205s;

205/60/15 are a tad large at 627mm, but if they haven't rubbed yet, they probably won't

no I'm not an escaped mad mathematician - check out the website of The Master;
http://www.unixnerd.demon.co.uk/bmw.html
look at 'wheels/tyres';