SUM Ultegra Di2 Colour:British Racing Green Specially braided fibres reduce string

Specially braided fibres reduce string abrasion

Maximum cog: 46T for 1x drivetrain (42T if 2x

Slim main lever body

125g / pedal

Clamp Diameter: 31

SUM Ultegra Di2 Colour:British Racing Green Specially braided fibres reduce stringDecisions, 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