Hayes Brake Dominion A4 Disc Brake Award-Winning Brakes If you want to stop fast and under control, you won't want to get just any hydraulic disc brakes. The Hayes Brake Dominion A4 Disc Brake is an award-winning brake that is ready for your next trail ride. The Dominion's master cylinder is factory-tuned for the shortest dead stroke possible and a crisp bite point. The Dominion A4 caliper utilizes four pistons in the most structurally rigid design possible. It features a cold-forged caliper and King Pin structural pad retention bolt that increases stiffness. With a motorsports-inspired Two-Stroke dual port bleed system, industry-leading DOT 5. 1 fluid, and Kevlar hose, the hydraulic system is engineered for ultimate performance across all temperatures and easy maintenance. Features Tool-free reach adjustment so you can dial in the perfect feel Flip-flop lever orientation and King Pin pad retention Crosshair caliper alignment and two-stroke dual-port bleed system Specifications Lever Material Aluminum Caliper Material Aluminum Rotor Size Compatibility180mm, 183mm, 203mm Adjustable Reach Lever Yes, Tool-Free Brake Caliper Mount Type Post Mount Hose Length (Front)1000mm Hose Length (Rear)1800mm Fluid Type DOT 5. 1 Fluid Pad Compound Semi-Metallic installed, Sintered in the box Number of Pistons4Rotor Included No Intended Use Downhill, Enduro, All-Mountain Weight310g (100cm hose and mount hardware) | Hayes | Brake Dominion A4 Disc Brake | Black/bronze | Left/front, 100Cm Hose