When speed across most any terrain is priority number one, look no further than the SES 4.5. Originally designed for the cobbles and crosswinds of Paris-Roubaix to provide an aero benefit with high volume tires, the SES 4.5 was the first of its kind and is now re-designed to deliver more speed in a lighter package. * Go fast, everywhere * INNERDRIVE premium disc road hub * Centerlock only (lockrings not included) * 1511g Wheelset Weight Avg. (XDR) (+/- 2%) * Inner Rim Width: 25mm * Aero optimized tire size: 27mm-28mm * Minimum labeled tire size: 27mm * For use with tubeless tires only