Tyre tread wear

[Bry]

Hi all

 

Wonder if anyone can help with this ?

 

My 2009 2.2d X Type Sport Premium was collected from MOT with thankfully a clean bill of health apart from an advisory " n/s and o/s rear tyre tread slightly out of shape"

 

On inspection at a tyre centre I was advised this problem was generally due to worn shocks which should have been an mot fail but the tyre guy said they looked ok.

 

One other issue is the fact that the rear o/s wheel has a slight buckle which I was advised of around a year ago but the tyre guy reckoned this wasn't the cause.

 

The car sits on the 18 inch Proteus wheel with Avon ZZ5 tyres all round ( except they're not all round)

 

Any ideas ?

 

Thanks

 

Brian

 

 

[O.T.H]

Hi Brian

If by saying they are out of shape you mean that they are ovel or not truely round

I would say that they are faulty tyres and that the bands that make the tyes up are at fault????

 

To be honest if it was me I would change them as soon as possible as they could be

a danger if you like to speed at all.???

 

Frank

[jag2]

brian. think ther is a lot in what franks saying. or maybe your alloys have a wobble . charlie

[Bry]

Thanks for the prompt reply guys I think the wording on mot is a bit unclear it is the outer edge of both tyres which are rippled or uneven not across the whole tyre but as there is a buckle on one I will replace them just need to find a good refurbed proteus  18 inch

first.

 

Any offers

 

Thanks again

 

Brian

[O.T.H]

If its the outer edge on both tyres my first thought is you are running them with the preasure too low .???

I would up them 3 or 4 lbs.

 

Frank

[Bry]

Thanks Frank - pretty good at keeping them up to recommended pressure 2.2 bar I suppose my compressor could be out but would this not affect the front tread also

 

Thanks for your reply

 

Brian

[Old Peter]

I tend to use an old fashioned pressure gauge, Brian.  Usually the best type.

 

But tyres and wheels are rather important!

 

Peter.

[O.T.H]

Thanks Frank - pretty good at keeping them up to recommended pressure 2.2 bar I suppose my compressor could be out but would this not affect the front tread also

 

Thanks for your reply

 

Brian

Hi Brian   My next thought would  be are you carrying any weight in the boot because I still think you should put a little

more pressure in the rear tyres ???     I don't think the front would be the same so leave them .

 

If it was just wearing one side of the tread I would say a suspension  arm fault but both sides point to tyre pressure.???

 

Frank

[O.T.H]

Hi  Brian

You say that you keep the pressures at 2.2 bar .....But in my manual it tells me that 18inch wheels on a XType

should be =

 

       Front---- 2.6 bars--=38lbs

 

       Rear-----2.4 bars--=35lbs

 

Only a thought .

 

Frank

[Old Peter]

And you are probably correct, Frank.

 

Incorrect tyre pressure is a common cause of uneven tyre wear.

 

Peter.

[Bry]

Thanks again guys according to the chart on door post 2.4/2.6 is for 100mph plus if only we could eh !

 

Strange that nobody mentioned shocks like the tyre centre did think I need to try a different tyre place.

 

Thanks again

 

Brian

[O.T.H]

Hi Brian

In my thinking if it was shocks it would be a very uneaven wear and bumpy but with airpressue it would be just the edges smothed off.???

 

Frank