Anyway, what are these 'fantastic' tyres that you speak of? Is it not
> possible that by the time you come to use them that there will be better
> tyres available? Time doesn't stand still you know.
>
No, time does not stand still, and that is a problem. It is not at all easy to find a source of 185SR13 tyres for a PI (still on its original wheels) at the moment. In the future it is likely to be even more difficult. Not everyone wants to replace original wheels with alloys to take the modern lower profile tyres.
Jim