Whats the crack with changing to a 17" - I could get freebie ex track day tyres

Porndog, thanks for your comments,
I don't intend skimping on tyres but being realistic, the NC is very much a sunny day toy for me, I don't intend doing track days & don't ride on the road like a racer, so I reckon most modern rubber will be just fine & if I can get a set for £50 cheaper that will last longer then bring it on

Hell, I have ridden the Alp like a loon at times and in all weather - on Avon Gripsters

Cheers for your comments all, Phil