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[Marks DTM Calib]

Nope..Must be 225/50-16..



I must note that 225/55-16 is cheaper here than 225/50-16..

as its not standard..and nobody wants it..

Cem they are 55's, the circumference of the 16 inch wheels is different to that of the 15inch and 17inch ones and hencewhy the 16 inch has diferent code indexes on the MID, Instruments etc which is set by Tech2.  

[cem_devecioglu]

Nope..Must be 225/50-16..



I must note that 225/55-16 is cheaper here than 225/50-16..

as its not standard..and nobody wants it..

Cem they are 55's, the circumference of the 16 inch wheels is different to that of the 15inch and 17inch ones and hencewhy the 16 inch has diferent code indexes on the MID, Instruments etc which is set by Tech2.  

yep.. you can arrange by tech 2..but acceleration will drop with higher diameters as pi is constant

ie. think like a higher ratio in every gear..

[Marks DTM Calib]

Nope..Must be 225/50-16..



I must note that 225/55-16 is cheaper here than 225/50-16..

as its not standard..and nobody wants it..

Cem they are 55's, the circumference of the 16 inch wheels is different to that of the 15inch and 17inch ones and hencewhy the 16 inch has diferent code indexes on the MID, Instruments etc which is set by Tech2.  

yep.. you can arrange by tech 2..but acceleration will drop with higher diameters as pi is constant

ie. think like a higher ratio in every gear..

Yes BUT 225-55-16 is the FACTORY fit tyre size.....

[cem_devecioglu]

Nope..Must be 225/50-16..



I must note that 225/55-16 is cheaper here than 225/50-16..

as its not standard..and nobody wants it..

Cem they are 55's, the circumference of the 16 inch wheels is different to that of the 15inch and 17inch ones and hencewhy the 16 inch has diferent code indexes on the MID, Instruments etc which is set by Tech2.  

yep.. you can arrange by tech 2..but acceleration will drop with higher diameters as pi is constant

ie. think like a higher ratio in every gear..

Yes BUT 225-55-16 is the FACTORY fit tyre size.....

Then the factory making mistake

[Marks DTM Calib]

Then the factory making mistake

Lol, why do I get this image ......

Hans (Omega Designer) - why have you been fitting 225-55-16 tyres to the Omega for the full9 years of production?

Fritz (Omega line manager) - zis is vot it said in the spec.


Funny creatures germans, they never question things.....if the spec said fit wheel and then cut a finger off they would....

[cem_devecioglu]

Then the factory making mistake

Lol, why do I get this image ......

Hans (Omega Designer) - why have you been fitting 225-55-16 tyres to the Omega for the full9 years of production?

Fritz (Omega line manager) - zis is vot it said in the spec.


Funny creatures germans, they never question things.....if the spec said fit wheel and then cut a finger off they would....

 

[markjodrell]

Thanks for the replies.

Ned, how much clearance have you got at the back of the tyre.I took my car to a garage yesterday and they have adjusted the camber to the tollerences given by Vauxhall. Its just that the gap between the back of the tyre and the shock absorber is tiny, 2 credit cards would be tight.

[Omegatoy]

you would be surprised at the differences between different manufactures, tyre sizes!!!! wouldnt mind betting if you put a rear wheel on the front at the moment the clearance would be better?
similarly if you put a brand new tyre of a different manufacturer on the clearance would again be different again, as long as its clear then only massive tyre deformation will allow it to touch the spring cup,and then only for a split second which may polish the bottom of the cup but do no harm to it, but it may mae the tyre get a bit warm whilst doing it, wouldnt worry about it tobe honest
JM2PW :yl

[Marks DTM Calib]

Thanks for the replies.

Ned, how much clearance have you got at the back of the tyre.I took my car to a garage yesterday and they have adjusted the camber to the tollerences given by Vauxhall. Its just that the gap between the back of the tyre and the shock absorber is tiny, 2 credit cards would be tight.

Pointless......the Vx tolerance is MASSIVE.

It needs to be -1deg 10mins......

As said, its about 10mm

[markjodrell]

I have checked with the garage and he assures me that the camber is correct according to Vx spec. Think I will try the rear or the original Firestone spare in the boot and see if the two budget tryes I have fitted are a bit wider.I suppose as long as the tryes dont rub the side of the shocker it should be okay. But its very close, 2 mm probably :-/ :-/

[Andy B]

.... I will try the rear or the original Firestone spare in the boot and  .....

Check its size. My original spare is smaller than the alloys on the car (195 ..... 15" ? steel)

[Marks DTM Calib]

I have checked with the garage and he assures me that the camber is correct according to Vx spec. Think I will try the rear or the original Firestone spare in the boot and see if the two budget tryes I have fitted are a bit wider.I suppose as long as the tryes dont rub the side of the shocker it should be okay. But its very close, 2 mm probably :-/ :-/

Again, an utter waste of time.....the Vx spec is huge at -1 deg 40' ⁺/_- 45' with a max difference of 1deg....so they could be set to close on -2deg 25' and still be within Vx spec which would be close on 6mm closer to the strutt!!

What was the Value he set them to....he should be able to tell you that.

From the factory they are set to -1deg 40' pretty much on the nose.

As the suspension ages the camber will increase quite a bit, they really need setting with less camber and hence the -1deg 10' due to this aged setup  

[markjodrell]

Again , thanks for the advice.

as the tolerences are so wide I may as well leave as, especially having already paid out £70 to have the camber adjusted. I suppose as long as the side of the shocker is just missing the tyre it should be okay.

Would you happen to know of an "expert" around Stoke-on-Tren who cI could trust to get it right if I decided to pursue it.

Thankyou  

[Marks DTM Calib]

Again , thanks for the advice.

as the tolerences are so wide I may as well leave as, especially having already paid out £70 to have the camber adjusted. I suppose as long as the side of the shocker is just missing the tyre it should be okay.

Would you happen to know of an "expert" around Stoke-on-Tren who cI could trust to get it right if I decided to pursue it.

Thankyou  

Having paid 70 quid then I would expect you to have a before and after geometry report, do you have this as it should include the camber values.

Beware that if you have to much camber then you will eat the inside edges of the tyres.

[feeutfo]

right, better late than never, just been able to check the gap shock to tire, and can get my middle finger to the first knuckle between tire and shock. Which is about 12 mill.  

Now then, its your car and your tires, so up to you. But, as my previous post, i speak from personal, very expensive and very dangerous experience. If this situation is left, i have absolutely no doubt your tires will be down to, if not through, the wire in 3000 miles.
Seriously...

  Get it sorted, having paid for a set up, i would think i reputable company would be happy to reset it, given the safety issues.