or maybe something else was the best, i can't remember. answering this question is like trying to answer "how long is a piece of string?" if you ask 10 different people, you'll get 11 different answers. you can pretty much ignore answers in the extreme, ie: tire A is the absolute (best, worst) and if you (ride, don't ride) it you'll (live happily ever after, and you'll be rich 'cuz the tires last forever and you never have to replace them...or, you'll die 'cuz they suck) . find a tire that fits your needs, and you will then have the best tire for you.
that said...conti makes great tires.
You can't go too far wrong with the GP 4000 S for training/racing or "century" riding. Good rolling resistance, durability & handling (from what I hear), and OK cost. Vittorias roll better but seem to be more fragile. Michelin PR3's seem to be loved or hated.
Michelin P3Rs are a hassle to get on and off Campagnolo Rims, at least. But that could be a plus is a sudden deflation should occur: Tire in caliper gives bad handling, and the Michelins should have less chance of ending up there if thing should go BANG.
Other than that: A good tubular is still better than a good clincher.
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