The Shimano Ultegra BR-R8100 Brake Calipers offer an ideal balance of lightweight and stiffness, making it the perfect choice for both enthusiasts and competitive riders.Shimano Ultegra BR-R8100 Brake Calipers FeaturesDual-pivot calliper brake with super SLR-EV design for quick linear response, increased rigidity and improved braking powerMust be used in conjunction with super SLR levers for the correct leverage ratioEnhanced brake arch proportions give a quicker linear response and increased powerLow profile outer cable stop position improves cable routing for reduced frictionSpring tension adjuster for precision set-upAdjustable toe-in on the brake shoes for easy setupAdded clearance for compatibility with 28C tyre size