The Pro 3 will flat if you look at it funny. Michelin wanted to produce a sub-200 gram racing tire, and sacrificed any measure of durability to do so. I will second what was said earlier, this is really a raceday-only tire. Unless your local roads are perfect, and scrupulously clean, which mine are not. Also, they are notoriously difficult to mount, turning a flat out on the road (which is essentially unavoidable) into a nightmare.