I am unsure of the rim width on the S1, it would be interesting to find out.
I have a feeling they are 8.0" wide, as on 225 tyres the rim does not protrude.
My thoughts were if all the later vehicles had wider rear tyres it might have been done during the Morgan "development" cycle to improve the handling and make it more neutral - hence my interest. (Plus wide tyres always look good!)
You may well be right. Talking to Image Wheels they suggested 8" front wheels would be better with 225s, but some tyre makers web sites advise 7.5 as optimal with 225s.
Interesting, I am sure there are reasons as to why certain wheel sizes are suited to certain tyres, guessing it is to do with the stretch of the tyre as fitted and how it performs under cornering flex/load.
Need to find somebody with a spare S1 wheel to measure..*heads to classifieds*
