Ultegra components offer an ideal balance of light weight and stiffness, making it the perfect choice for both enthusiast and competitive riders Low profile aerodynamic direct mount Super SLR-EV Dual-Pivot design provides superior brake performance and light action 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 Can be used on frames with bottom bracket / chain stay direct mounts Low profile outer cable stop position improves cable routing for reduced friction Cartridge brake shoes for easy replacement Convex washers on the brake shoes offer toe-in brake adjustment and easy alignment Lightweight aluminium construction, with an anodised finish to preserve the good looks Added clearance for compatibility with 28C tire size