And in other news Oliver Haslam is quoted as saying:
Is there a web site where I can tell it what my car is, and it will
> tell me what size wheels I can fit without any problems? With my
> limited knowledge, am I right in thinking them fitting under the
> arches isnt the only problem, but rather whether the gearing will be > affected?
>
If they don't fit under the arches the gearing isn't really a problem :)
What car is it? What size wheels and tyres are on it now? What size do you want to fit?