Tyre Size Question

[mattchubb1]

Ok so I need to get a couple of front tyres as the limit is approaching...

Now I've just been looking at tyres which are the size of the ones on the car... 235/45/17/98w... But I when I typed I the reg no into one of the tyre websites it came up with a slightly different size 235/50/17... And then when I looked at the original BMW x3 brochure it said this same size all round?

I've got the wheels in this link
viewtopic.php?f=7&t=3182

Any ideas?

Cheers
Matt

[C ///M]

I don't think any of those is right. They're all undersized. In a 17, with a 235 width, you should be at a 55 aspect ratio. So 235/55R17. I don't know the exact 17" sizes, but my M-Sports factory size was 235/50R18 (equivalent overall diameter in 17 is a 235/55R17).

[X5Sport]

Alloywheelsdirect.net confirms that the 17" rims should be as above: 235/55R17 all round, and choose your speed rating as necessary.. :

It's a useful site for looking up the OEM wheels and then the different tyres that can be bought to go with them. They only deal in OEM offered equipment..