I have been using Michelin PRO Race2 and 3 for the past few years and have been quite satisfied but there are so many others to choose from. I'm getting ready to mount the wheels for spring even though riding is still a month away. I will be getting new tires and I am itching to try something different. It's gotta be fast but also somewhat flat free. I'm thinking of Veloflex Blacks, anybody out there tried them? I've tried Ultremo's and they felt good but the rubber disintegrated in a few spots. Alot of club members use Continental GP 4000 but I never have tried them. What is everyone using this season?