I really didn't intend anyone to get their nickers in a twist. Hope you're OK.
The original question was about how big a tyre could fit under the front guard. I was mostly referring to the suggestions that he try a smaller front tyre and various different sized rear tyres.
I must admit that I too was tempted to comment on the stupidity of putting a car tyre on a motorcycle, but thought better of it.
I've learnt that my views on that topic shouldn't be aired unless certain members have tissues on hand.