Tubular tire on hooked rim I just bought a new (second-hand) bike (Orbea Asphalt sport) and I was looking at the tire and found out it was a tubular tire, a Continental Grand Prix, but on the sides you can read 'only mount on a hooked rim'. Is it possible for a tubular tire to be mounted on a hooked rim?
Tufo makes tubular clinchers.  Clement made something similar in the eighties, called the Ritmo, I believe.  I don't think Continental does, I'm pretty sure they're just regular clincher tires.  

You can ride tubular tires on clincher rims in an emergency, but they'll roll off the wheel if you're not very careful in the corners.