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