Not a lot wrong with the Avon SM MkII, really! It has tread where you actually need it, not up the sidewalls where it never gets used.
Thing is BS, I do use it quite a lot
![eek *eek*](https://www.a7a10.net/forum/Smileys/default/icon_eek.gif)
I've done around 3k on the rear AM26, and the centre line tread is almost up. Had a Mitas in the past - 2k and horrible, never had a SM (Skid Master??), what IS 'safety mileage'??.
Years ago, when I was on a YB100 riding 20,000 miles per year for our business, I asked the guy at the bike shop in Stoke-on-Trent (who we knew very well), what was the hardest tyre he could get his hands on as the constant stop-starting and country lanes were wasting a tyre every couple of thousand miles. He went up the loft amongst all the debris, and picked out what looked like a square section sidecar tyre (Avon, I think). Hard as rock, tons of tread, no grip wet, careful when dry, around 8k miles.