12,000 miles from an OE sirac?! Crikey do you levitate? I got 4,500 and they were toast. I thought the Sirac was a good tyre, very balanced.
I've just fitted Pirelli Scorpion Trails, I'm interested to see how they fare compared to the Bridgestone Battlewings that I ran last autumn. So far so good. Huge amounts of grip, or maybe I'm being spoiled after the Mitas's. Even fresh on the bike in the rain yesterday there was no hint of movement.