Hayes Dominion A4 Hydraulic Disc Brake

Introducing the all-new, Stealth Dominion, our award-winning Hayes Dominion A4 brakes are back – adding even more ways for you to stop!

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.

Features

• 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