* Conceptualized for the cobbles of Paris-Roubaix through partnership with Team Dimension Data, the SES 4.5 AR Disc was developed to deliver top shelf aero performance, stability, and comfort for virtually any road surface.* Tubeless optimized hookless beads* Dissimilar rim shape and geometries for front and rear rims * Best aero performance when used with 28c tires * Increased air volume for improved rolling resistance * Disc brake only construction* We recommend the use of tubeless type road tires only* If using a tube-type tire, there is a max pressure rating of 80 psi* ONLINE SALES PROHIBITED UNLESS AUTHORIZED BY ENVE