Can I attach aero extensions to my HB13/HB18/HB19/AB09/AB07 handlebar?

We do not recommend the use of clip-on aero extensions with our HB13, HB18, HB19, AB09, and AB07 handlebars. These handlebars are designed with an aero profile that makes attachment difficult, and more importantly, they are not designed or tested to withstand the loads applied by clip-on extensions. We do not test aftermarket components, and any damage resulting from the installation or use of clip-on aero bars would not be covered under our warranty.