DURA-ACE R9200: Built without compromiseShimano's study in the science of speed has taken developments to a completely new level. The freshly redesigned DURA-ACE groupset provides an abundance of evidence that Shimano will leave no stone unturned in the pursuit of next-level speed.Wheel System: Aerodynamics, Rigidity, & LightweightThe last pillar in the science of speed is the wheels, the final point between the rider's input and the speed output. Shimano has redesigned its wheel line-up with a balance of three factors: drag reduction without sacrificing control, driving force rigidity thanks to a new DIRECT ENGAGEMENT hub, and lighter weight construction. These principles make up a full carbon tubeless and tubular options to exceed today's standards.C50: The All-RounderThe C50 is the all-rounder of the R9270 range, with a great balance of drag, lateral and driving rigidity, periphery and overall weight and controllability. Specifications . Wheel Size: 700c . Internal Width: 21mm . External Width: 28mm . Rim Height: 50mm . Target Weight (Pair): 1461g . Brake Type: Centerlock Read More