Tyre Pressure on 19"

bmw_fan · Post by **bmw_fan** » Sat Mar 26, 2011 1:51 pm

Hello everyone,
I checked my tyre pressure this morning and found 3-3.1 bar. The tyres are new and have been fitted by my local bmw dealer 5 weeks ago (summer tyres). According to the sticker it's supposed to be 2.2 (for 255 front and 285 rear) so I deflated the tyres and adjusted the pressure but now I found the ride sooooo heavy ! Am I doing something wrong here ?
Thanks

X5Sport · Post by **X5Sport** » Sat Mar 26, 2011 2:48 pm

A drop of 14psi (1 bar approx) will do that, but you will have improved grip and wear however I am surprised that the dealer pressures were all that far out though. Is your pressure guage OK? There's always the possibility that their guage was right and yours is approx 1 bar out - which would then have an effect on your steering weight. Might be worth double checking.

bmw_fan · Post by **bmw_fan** » Sat Mar 26, 2011 4:04 pm

Thank you for that. It did cross my mind. I use a Michelin digital gauge..and never had an issue with my other car (e46). Maybe it's not accurate (after all these years...) Any recommendation for an accurate pressure gauge?

BL02WAS · Post by **BL02WAS** » Sat Mar 26, 2011 5:21 pm

tescos garage, they must surely have some form of calibration capture on their inflators.....i bought a cheap little pump off ebay last month, thought i would check my pressures of new wheels/tyres just fitted and it was showing 60 psi!!! lol so bout 4 bar ish (14.6 psi to a bar yes) well anyhow down to tescos and they were all equal sat at 38psi

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x555 · Post by **x555** » Sat Mar 26, 2011 6:16 pm

I run my 19's at 32psi all around.

JF1980 · Post by **JF1980** » Sun May 01, 2011 1:56 pm

I used to run 32 PSI all round but found on the front tyres I was getting significantly more wear on the outside edges than the middle of the tyre and on the rears I was wearing on the inside edge. I've had all new tyres a week or so ago and full alignment/camber adjustment to within spec. I've had the fronts on 2.2bar and rears on 2.7bar as I was towing last week. It's only ever me in the car so I should drop the rears back down to 2.2bar but I might leave them for a while and keep an eye on the wear pattern.

Interestingly the dealers/bodyshop changed three of my tyres and I had the forth changed at kwickfit. When I went to check the pressures they were all over the place. The guy in kwickfit said I should keep the rears at around 38PSI which is 2.7 bar (ish).

That said I've had a tyre changed in kwickfit before and found they didn't tighten up the wheel bolts so I'm not going to rely on what they say too much.

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