The top of the line road wheel set from Shimano's Dura Ace line uses an all-carbon deep section 50mm tubular-only rim and their legendary Dura Ace hubs with new wider flanges for increased rigidity and power transmission. Also has Shimano quality proven angular contact bearings and titanium freehub body w/quick engagement. Ridden to victory in the 2007 Iron Man World Championships and also used by many top professional cycling teams. 1469 grams/set including QR skewers.