I am always surprised to see how American Triathlete are paying little attention to American Classic Products. I am French but I dropped Mavic and bought AC420 wheels and did not regret it a second. At 420 grams per rim and a 34mm profile with a low spoke count, a weight of just a tad above 1,400 grams for the pair, I can see no justification to not choose them over a lot of other wheels. These wheels are probably the best mix of lightweight/aerodynamics/pricing around. There is more aero, or ligher, or cheaper, but they are a very appealling compromise. And definitely a much better choice the Mavic Ksyriums!! Their hubs are very well built, the ratchet mechanism is excellent, the rims are tough, the wheels are hand-built to extreme standards, and although they have started advertising more lately, the pricing is still awesome. Check them out and don;t pay hundreds of Dollars extra for Mavic's big name. And again, I am one of those arrogant French! :-)