The shimano dura ace br 9000 brake calliper is part of shimano39s ultra lightweight dura ace range the br 9000 will provide you with exceptional braking performance so you can keep in total control of your bike in all conditions the brakes have superior modulation and power for braking and they have a new brake cable system for more precise braking these brake callipers weigh in at 297g per pair meaning they won39t add any unnecessary weight to your bike and they certainly wo