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[Hannah Judes Dad]

As per the header,I'm looking at a set of 17" wheels on egay at the moment that were on a Vectra the present size is 215 50 17.Will these be ok to use as is or will they need new rubber? Thanks in advance folks 

[Andy B]

As per the header,I'm looking at a set of 17" wheels on egay at the moment that were on a Vectra the present size is 215 50 17.Will these be ok to use as is or will they need new rubber? Thanks in advance folks 

235 45 17  No idea of the comparable rolling radius though  :-/

[Hannah Judes Dad]

As per the header,I'm looking at a set of 17" wheels on egay at the moment that were on a Vectra the present size is 215 50 17.Will these be ok to use as is or will they need new rubber? Thanks in advance folks 

235 45 17  No idea of the comparable rolling radius though  :-/

Judging by the size difference it will show that my car is going faster than it really is but I wonder by how much ?
I hope someone on here can work it out,I'm too thick 

[henryd]

The two sizes mentioned have about 0.5km/h difference in them so negligible,sorry it's km/h but that was the site I used

[Elite Pete]

You may have an insurance issue as well so I would let then know you've changed the tyre size

[hotel21]

http://www.miata.net/garage/tirecalc.html

 

[Hannah Judes Dad]

The two sizes mentioned have about 0.5km/h difference in them so negligible,sorry it's km/h but that was the site I used

No problem it equates to less than 0.32 mph so it's nothing to worry about 

[twiglet]

What about the offset? I thought Omega's had a different offset to the FWD vxl's. Not sure if this would be an issue though...

[Terbs]

I bought my Omega with 17" alloys fitted. Are they not the ones it started life with? Had the geometry all checked out at WIM a while back, and nothing was said about the wheels not being 'normal'. My tyres are 235/45/17 
As Pete mentions insurance....do I need to contact them. I am sure handbook lists my tyres, will have to dig it out.

[Andy B]

I bought my Omega with 17" alloys fitted.

your car is a facelift  so were standard.

Are they not the ones it started life with?  .....

No. His car came with 16" cos it's prefacelift. 

[Terbs]

Thanks Andy

[hotel21]

Elites generally had alloys as standard however, over several years/owners, may have steels fitted - or vice versa, if it started with steels.

Have a look through the gallery section and see the range of standard alloys.  The ones on mine are factory standard and 235/45-17. 

[duggs]

I have 235's on my Elite along with Vectra C wheels. See "Sunny Suffolk Day" in the gallery section.

[Malcolm_D]

Elites generally had alloys as standard however, over several years/owners, may have steels fitted - or vice versa, if it started with steels.

Have a look through the gallery section and see the range of standard alloys.  The ones on mine are factory standard and 235/45-17. 

Totally off thread but is there a guide to include pictures of this size in a forum message? 

[Mr Gav]

What about the offset? I thought Omega's had a different offset to the FWD vxl's. Not sure if this would be an issue though...

I think it`s a potential issue, Omegas use a 33mm offset where as the Vectra uses something like a 40mm offset. This means your wheels will be sat 7mm further in than standard.
The wheels on my omega are 7x17 and have a 40mm offset and they just don`t look right, also both front wheel bearings have failed recently and looking through the service history I`ve found that they done in 2007 and I`m convinced that the premature failure on both at the same time is caused by the wheels using the wrong offset.
As for the correct size for a 17" wheel, it depends on the width, a 235 would be too wide for a 7" rim but fine for a 8" rim.