SHIMANO ULTEGRA BRAKE REAR- 6800
Braking is one Ultegra 6800's 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 (that’s 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.
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