Hayes Dominion A4 4-Piston Disc Brakes

The Hayes Dominion A4 master cylinder is engineered to achieve the shortest possible dead stroke and a sharp, responsive bite point right out of the factory. The Dominion A4 caliper features a four-piston design, optimized for maximum structural rigidity. This is achieved through a cold-forged caliper and the inclusion of a KingPin structural pad retention bolt, which significantly enhances stiffness.

Inspired by motorsports, the Two-Stroke dual port bleed system, combined with top-tier DOT 5.1 fluid and a Kevlar-reinforced hose, ensures the hydraulic system delivers peak performance under all temperature conditions and simplifies maintenance. This setup ensures reliability and top-level performance, making it a prime choice for demanding hydraulic needs.

________
Features: 

• 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.
• Tool-Free Reach Adjustment
• Flip-Flop Lever Orientation
• King Pin Pad Retention
• Crosshair Caliper Alignment
• Two-Stroke Dual-port bleed system

________
Specifications: 

• Recommended brake rotor: Hayes D-Series (not included!)

________
Each complete brake set includes: 

• 2 Dominion A4 levers
• 2  Dominion A4 callipers with pads
• 4 Fastening screws
• 2 barbs
• 2 olives
• Disc brakes are ready-to-install, filled and bled!