Ultegra components offer an ideal balance of light weight and stiffness, making it the perfect choice for both enthusiast and competitive riders .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.