The shimano ultegra r8000 brake offers an ideal balance of light weight and stiffness making it the perfect choice for both enthusiast and competitive riders shimano ultegra r8000 features dual pivot calliper brake with super slr ev design for quick linear response increased rigidity and improved braking power must be used in conjunction with super slr levers for correct leverage ratio enhanced brake arch proportions give a quicker linear response and increased power low profile outer