My rear tyre had the profile of a brick so I went looking on ebay and found an Avon SM MkII for £70 including shipping.
It's a 5.00 x 16, a tad narrower than the recommended 140/90 x 16 so it should make the bike slightly more 'flicky'.
It'd been fitted to a show-bike so had never actually been used on the road, still had the bobbles on it.
I fitted it today - it's been a long time since I fitted a tubed tyre, touch wood I didn't pinch the tube.
Looks good but with the rear mudguard back on is almost impossible to see!


.