Tread wear

[Retman]

Ok not the sexiest subject but just had car serviced (V12V) and after 5k miles on (girly ) P Zeros tread depth across the fronts is 4.40, 7.00, 4.30 outer, mid, inner, and on rears is 3.70, 5.50 and 3.70. Is this an acceptable/normal variation or an indication of under inflation? Let me say here and now I will ignore all comments to the effect that they shouldn't have that much tread left after 5k miles

[Laser Sag]

Wold definately suggest underinflation to me

[V8 Animal]

Laser Sag said:

Wold definately suggest underinflation to me

I agree.
But why didn't the tyre monitor pop up I put 2lb extra in which stopped the warnings.

[Retman]

V8 Animal said:

I agree.
But why didn't the tyre monitor pop up I put 2lb extra in which stopped the warnings.

Mmm good point, could be they were under inflated when originally fitted by the AM dealer rather than a subsequent loss of pressure?

[Retman]

pmjg66 said:

yre pressures should be checked manually every week,was they within the manufacturers recommended settings over the service interval ?

Got to admit I have neglected this relying on the monitors flagging a loss of pressure- not good if they aren't right in the first place. Nothing was mentioned at the service (by another dealer) but I'm not sure they actually check pressures, I know BMW don't - I queried mine when it was last in and they said they don't check them as part of the service.

[PiloteAM]

I remember someone knowledgable about these things saying that the way Astons are setup causes uneven tyre ware, but that seems quite significant.

[mikey k]

PiloteAM said:

I remember someone knowledgable about these things saying that the way Astons are setup causes uneven tyre ware, but that seems quite significant.

Never had this issue on mine, I always get even wear front and back but then I have a compressed air thing going on
Retman those are under inflated

[Neil1300r]

Andrew, it shows all the signs of an owner that has lost significant weight and who hasn't altered the tyre pressures to take account of the weight loss in the middle of the car

[Retman]

Neil1300r said:

Andrew, it shows all the signs of an owner that has lost significant weight and who hasn't altered the tyre pressures to take account of the weight loss in the middle of the car

Neil, only you have identified the obvious fact that I and so many others have missed . Reckon about 15psi should do the job.

Time to get this sorted so bought Pitking pressure guage and will see just how far out they are.

[Laser Sag]

Don't know about the tyre pressure monitor on the Astons but on the BMW and VAG group ones they are there to inform of sudden loss of pressure which will not be felt with the run flat tyres that are frequently fitted. They do not detect the slow loss of pressure that happens naturally on tyres, check them once a week with good accurate tyre pressure gauge is the only way to keep track of the pressures unless you have one of the latest systems that show individual tyre pressures.
You posted about getting a pressure gauge while I was typing my reply, must speed up my typing.

Edited by Laser Sag on Thursday 6th March 11:29

[mikey k]

Retman said:

Time to get this sorted so bought Pitking pressure guage and will see just how far out they are.

Make sure it will do 1/10th of a psi increments for best results (most only do 1 psi or 0.5psi if you are lucky)

[yeti]

PiloteAM said:

I remember someone knowledgable about these things saying that the way Astons are setup causes uneven tyre ware, but that seems quite significant.

Very dependent. Mine were on the canvas on the inner edges, still have over 4mm on outers and middle! My car is pretty aggressively set-up, but was a hell on an eye-opener for me!

I would expect to need 4 new shoes after Rockingham and before Le Mans

[Cockernee]

Under-inflated Andrew and by a good few PSI. I am however very surprised that the centre has that much tread after 5000 miles. IIRC they only start life with 7mm, possibly 8 on Girly tyres

[Retman]

Cockernee said:

I am however very surprised that the centre has that much tread after 5000 miles. IIRC they only start life with 7mm, possibly 8 on Girly tyres

Cant believe that took you so long You forget I have Miss Daisy in the passenger seat on many occasions

You're right about the tyres before Le Mans ( Classic) Lewis but those will be on the MGC (the one in my profile pic), they look like new but close inspection reveals one or two bulges on the treads, pretty poor for 2,000 miles of use I'd say - maybe something to do with them being over 10 years old - testimony that the warnings that tyres do not have a long life even if lightly used are true. Car has become a major garage queen which a recommissioning and run to LM should start to put right.

Thanks for the advice/opinions everyone, off to pump up some tyres, come to think of it I've still got a part used cannister of helium, wonder how that compares with nitrogen, maybe that's the start of another thread

[fuzzy01]

Our offside front tyre actually "grew" an extra mm of tread in the middle between mot's according to the service record !!