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 cable stop position improves cable routing for reduced friction Spring tension adjuster for precision set-up Adjustable toe-in on the brake shoes for easy set up Added clearance for compatibility with 28C tire size