E46 18" tyre pressures.. Psi / Bar

[H6CJF]

I confess I'm puzzled. My 330d Sport touring has 255 35 18's on the back and 235 40 18 on the front - as you'd expect.

The plate on the b post says tyre pressures of 2.6 bar front and 3.0 bar rear. By my reckoning thats about 43psi rear and 37psi front, yet whenever I have tyres fitted they always set them to around 25 psi front & rear. I have to say the bar figure seems very high.

What do you run yours at?

Chris

[edc]

Just done 35f and 36r. Seems ok so far. It feels crashy though but when I pit on 33 psi they actually looked low.

[MattOz]

Chris,

I suspect you mean 225/40/18 on the front?

I run mine at 33 front and 35 rear and they're spot on in my opinion.

[H6CJF]

MattOz said:

Chris,

I suspect you mean 225/40/18 on the front?

Indeed I do!

Thanks chaps I'll give it a go at around 33f /36r then. God knows how hard the ride would be at 43psi!

[Craigwww]

25psi front and rear is very low!

34 front

36 rear for me! E46 330i Sport.

[H6CJF]

Well I have now got them set at 33 front and 37 rear... according to Asdas very clever tyre blower upper machine. The ride is certainly much firmer as you would expect. I think I can feel every grain of Tarmac now! It does seem to tramline more but that could be down to wear pattern as a result of running at lower pressures. As for handling, I've not had chance to explore fully but I fancy turn in may be a tad sharper than it was.

Anyway, thanks for the help. Bloody BMW... why can't they give the figures in psi in the first place instead of flippin Bar!

[davy9449]

Interesting, well I am running about 35 front and 43 on the back. I think I might tone it down a bit, it is a little bouncy at times it has to be said. Having said that, 99% of my driving is done with just me in it so not much extra weight being applied!