Hayes Dominion A4 disc brake black/bronze

Making power is easy. Making power with the right feel, that was our challenge. We did this by creating an all-new system.
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 KingPin 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.
Dominion A4 features the proprietary QuickBite² system for fast and consistent burnish, coupled with our D-Series rotor to manage the heat with less braking noise.

• Cartridge-bearings used in the brake lever
• Aluminum piston operates smoothly across operating temperatures
• Piston glide ring technology pioneered in suspension forks
• Caliper: Two Stroke – Dual caliper bleed ports for maximum bleed integrity
• KingPin – Structural caliper pad pin
• Crosshair Caliper Alignment System: Dramatically simplifies caliper installment and alignment
• Patented Crosshair caliper alignment screws
• Allows mechanics and end users to quickly and accurately set brake caliper with no rubbing of the rotor on the pads
• Eliminates guesswork and trial and error
• Makes set up process quick and easy for ‘out of the box’ build
• QuickBite² – Offers riders the shortest path to high performance
• Fast, consistent burnish
• Predictable performance
• Quiet

• Lenght brake hose: Front / 1000 mm, Rear / 1800mm