Tyre Pressure Query

Fri Oct 09, 2009 11:05 am

What's the correct pressures for 205/50x16 tyres on 7.5" rims, front & rear, on a 6-cylinder touring please?
TIA
Stuart.

Fri Oct 09, 2009 12:41 pm

32psi

Fri Oct 09, 2009 9:22 pm

blitz877 wrote:32psi

Is that front and rear??
Anyone else got any input here? Or do I need to 'phone Birds?

Fri Oct 09, 2009 9:32 pm

seems very high?

Fri Oct 09, 2009 9:49 pm

Hmmmm.... I'm guessing what you need is someone with an alpina doorjamb sticker, though alpina 16s are only 7J or 8J

I wouldn't think you could go far wrong with something around 32psi - after all, the biggest factor is really weight, and that hasn't changed.

Fri Oct 09, 2009 11:26 pm

the standard pressures on my 325i touring do look very high, higher than any other car i've owned anyway

i tend to stick halfway between the laden and unladen figures as mine weighs in at 1400kg

due tothe LPG tank and M30. too high on the back and it can get quite lively

Mon Oct 26, 2009 5:39 pm

Just had a reply from Kevin Bird and he says 2.3bar F & 2.5bar R

Mon Oct 26, 2009 7:23 pm

StuBeeDoo wrote:Just had a reply from Kevin Bird and he says 2.3bar F & 2.5bar R

What's that in old money?

Mon Oct 26, 2009 7:27 pm

djk wrote:
StuBeeDoo wrote:Just had a reply from Kevin Bird and he says 2.3bar F & 2.5bar R
What's that in old money?

32F, 35R

Mon Oct 26, 2009 9:13 pm

35, cant be right surely? the back would be spinning all over the road

Tue Oct 27, 2009 7:25 pm

I have alpinas on my touring with 205/50x16 tyres. I run 30psi front and 32 psi rear. I up the rear to 35psi for big loads.

Wed Oct 28, 2009 5:12 pm

asmith88 wrote:35, cant be right surely? the back would be spinning all over the road

TBH, I have doubts.
I'm going to see what the tyre wear is like running them at 2.0bar/2.3bar and take it from there.
The car's harsh enough on the road as it is without blowing the tyres up any harder.

Wed Oct 28, 2009 5:27 pm

My 5 series suggests up to 42psi in the rear IIRC.

Wed Oct 28, 2009 5:31 pm

yep, the fronts on my fiat coupe are 2.7bar! (40psi)

Wed Oct 28, 2009 7:33 pm

My E36 325tds se touring fully laden is well over 3bar IIRC. 32psi/35psi on a touring sounds fair to me, I run 32/32 for road use 205/55 r15s.

Wed Oct 28, 2009 7:38 pm

32 front and back

Wed Oct 28, 2009 10:49 pm

I run 34 f+r on 15s, the manual says mid 40s fully laden

Mine is v sensitive to minor differences in tyre pressure, like half a psi on one rear will cause the breaks to pull

Thu Oct 29, 2009 12:37 am

Does it REALLY matter that much? I usually just do them all about 32 alll round, touring & cabby and leave it at that. What's the point about being anal about it, pressure will fluctuate with heat/driving conditions etc.

-

Thu Oct 29, 2009 9:29 am

You can definitely feel the difference if they are not correct, but half a psi sounds a bit extreme!
Mine are whatever it says on the door plate, seems to work fine. I realise that only works for standard sizes though.

Thu Oct 29, 2009 1:50 pm

I have found e30s to be more sensitive to uneven tyre pressures than other cars - however, I would say anything in the right ballpark, as long as they are the same side to side, should be OK. Garage forecourt/footpump pressure gauges are rarely very accurate - if you aren't checking with a proper gauge they are probably nothing like what you think anyway.