With a motorsports-inspired Two-Stroke dual port bleed system, industry-leading DOT 5.1 fluid, and Kevlar hose, the hydraulic system of the Hayes Dominion A4 disc brake is engineered for ultimate performance across all temperatures and easy maintenance.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.

FEATURES
SPECS

FEATURES:

• Can be used for front or rear
• Dominion A4 features the proprietary QuickBite system for fast and consistent burnish
• 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

SPECS:

• 310g (100cm hose and mount hardware)
• DOT 5.1 Fluid
• Tool-Free Reach Adjustment
• 2-Stroke Dual Port Bleed System
• Sealed Cartridge Bearings Lever Pivot
• 100cm Front Hose Length
• 180cm Rear Hose Length