A6 Avant 2.7tdi Quattro tyre pressures...

[nick_j007]

Bit of a mouthfull the car title

My OH's car is as the title says. Her NSF if very soft and will be looked at for a potential puncture tomorrow. Being run flats make it hard to know when there's a real problem...sensors would be nice.

The tyres are ZR19's. On the fuel cap cover it only shows one set of infaltion figures for the ZR19's: 38 psi on the rear, 44 on the front. It shows no difference regarding number of passengers or luggage...is that right, same pressure for all situations?

Thank you in advance for your thoughts.

Nick

[Dr G]

Did you fit the runflats yourself then?

Have just looked inside a filler flap for the same car and they do indeed show only one for the 19s, how odd. Will dig out a manual and have a peek...

[nick_j007]

no, they came as standard.

Tyre centre told my partner that she had a 'loose valve' ooo 'er.

Any thoughts on the pressures would be welcome

[phumy]

It may well be that because they are runflats they dont need a different pressure for loaded or unloaded as the side walls on runfalts are a completly different design to non runflats and are much stiffer. Is she getting a warning that one tyre pressure is low? Normally the low pressure is sensed from the difference in the speed of the wheel, sensed from the ABS sensor and calculated, as a low pressure tyre will allow the rolling circumference to be less than a tyre at the correct pressure.

[blueg33]

I may be wrong, but I didnt think runflats were fitted as standard or even as an option

[nick_j007]

Hmmmm, well I assumed they were runflats based on their behaviour when we had a flat a while back.

How can I tell for sure? Will it say on the tyre wall?

Ok, so a set pressure for all times on these tyres anyway.

[nick_j007]

phumy said:

It may well be that because they are runflats they dont need a different pressure for loaded or unloaded as the side walls on runfalts are a completly different design to non runflats and are much stiffer. Is she getting a warning that one tyre pressure is low? Normally the low pressure is sensed from the difference in the speed of the wheel, sensed from the ABS sensor and calculated, as a low pressure tyre will allow the rolling circumference to be less than a tyre at the correct pressure.

No alerts re tyre pressure in the car.

We may embark upon towing a caravan so I ought to get this all straight in my mind prior. Sorry, the 'C' word.

Will look at the tyres later on to see if any references re the runflat.

[phumy]

nick_j007 said:

Hmmmm, well I assumed they were runflats based on their behaviour when we had a flat a while back.

How can I tell for sure? Will it say on the tyre wall?

Ok, so a set pressure for all times on these tyres anyway.

Yes it will say on the sidewall.

[blueg33]

On my A6 Saloon with factory fit 19 inch wheels (not runflats) The airpressures for laden are about 2psi more on the front and 10 psi more on the back. Sorry I cant remember the exact figures but they are indicated on the inside of the fuel filler flap.

[nick_j007]

No references to run flats so they can't be (?)

They are:

Continental Sport Contact 3
Category:High performance tyres
Tyre Type:
The Continental Sport Contact 3 is a summer tyre for ultra high performance sports coupes, powerful cars and luxury sedans. The perfect summer tyre can only be driven on dry roads and it is not intended to be driven in sub zero temperatures on icy and snow covered roads. The maximum performance tyre exhibits precise steering response and has excellent braking capacity.

Would still like to resolve the pressures quandry. I shall see what the tyre lads put them at later on.

Thanks all.

[nick_j007]

Interesting site on my explorings: http://www.tyrereviews.co.uk/Article/Video-All-Sea...

Pretty sure the Conti's are not run flats now.

[Dr G]

As far as I'm aware Audi don't fit runflats to anything.