ENVE SES 4.5 RimFRONT REAR Depth 50mm 56mm Internal Width 25mm 25mm External Width 32mm 32mm Hole Count 24 24 Effective Rim Diameter 558 547 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,