Hayes Dominion A4 Bronze

Regular price $229.99 Save $-229.99
2 in stock
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.

MASTER CYLINDER: LoFi (Low input / High Fidelity) – Speaks to the overall system feel. Master cylinder dead stroke tech / cam profile / feel
  • 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
D-SERIES ROTOR: MRC (Modal Resonance Cancelation) – Rotor harmonic design
  • All objects have a resonant frequency
  • The FEA-optimized modal shapes of D-Series rotors is intentionally designed to oppose that of Semi-Met T106 and Sintered T100 pads; this cancels out noise and vibration translating into more consistent braking
  • 1.95mm material thickness enhances heat dissipation
QuickBite² – Offers riders the shortest path to high performance
  • Fast, consistent burnish
  • Predictable performance
  • Quiet