Has anyone tried the Schwalbe Stelvio 23mm tires yet? I ride terry bikes (a titanium isis and dropped bar steel classic) with 24" front wheels so don't have a lot of choice in tires. I'd been running the panaracer pasela 25mm tires with fairly good luck on both my bikes until this week when I got 3 flats on two different bikes! In one case the tire has ~3000 miles on it and looks pretty worn but in the other it only has 500 (but bad road trash on my commute). I plan to put the stelvios on Isis, which is my 'go fast' club riding bike, but how will they hold up (i.e flat resistance?) if I need to use her for an occasional commute while my classic is in the shop? I am thinking to put the wider (32mm) pasela with tourguard in the rear on my classic, and the terry tullus (32mm) in front for commuting/touring. Anyone know how flat resistant the tullus is? I noticed it doesn't have kevlar or tourguard.