Originally Posted by HighlandPete
You would need to know the exact size and offset, plus I'd be concerned of the quality of the rims themselves. There are good and bad in replica rims. I personally would prefer a rim type from the OEM range for the car, but obviously will cost more if you can find a used set.
It is a difficult shout, as to what solution is going to give you what you want. Will an 18" non run-flat improve the ride quality enough over rough roads? Rim weight and tyre specification could be as critical as size and a move to a non run-flat.
Plus the comment in the other thread, "it's smoother, but not £1200 worth smoother".
I know, it's a difficult call. Maybe I should keep the current rims and just replace the tyres. But the OEM 17'' rims aren't great looking by any means.