Dave,
I have just got a new +4 and it has 195/60/15 tyres so perhaps that tells you what you want to know. I'd only be interested in one if it matched my Aston Martin Mendip Blue, but Without a sample of the blue plastic it would be difficult to judge. I also would like a pair of your rebound spring gaiters - are you still doing them?? If you are, what is the price and perhaps when sending them you could magic up a small sample of the blue plastic!!!
Cheers!