SUM Ultegra Di2 Competition the Adapter Plate is built

the Adapter Plate is built to last

Possible to select appropriate gear combination for stress free long riding

Features include a highly breathable mesh instep that helps keep your feet dry

8% ELASTANE

SUM Ultegra Di2 Competition the Adapter Plate is builtDecisions, decisions made easy. With a bike that gives you flat out advantage on the climbs, the sprints and the straightaways, the only decision youll need to make is how nice you want to be to the other guys. A rider oriented design approach ensures a frame that is both rooted and responsive, with a ride experience most aero frames cant match. With a layup engineered to maximize aerodynamics while keeping weight low, the design process for the Sum