Shimano ultegra 6800 road brake caliperbraking is one ultegra 6800s major advances evidenced by the inclusion of a revised standard caliper and front and rear aero brakes for which shimano has also produced 105 equivalents thats the br 5710 part code fans the ultegra aero brake has direct mount options for fork front and chainstay rear and claims for increased modulation featuresultegra components offer an ideal balance of light weight and stiffness making it the perfect choice f