Hayes Dominion A4 Disc Brake

The Hayes Dominion A4 is a shop favourite 4 piston disc brake designed for Downhill, enduro, trail and e-mtb use. They combine impressive power modulation and an incredibly light lever feel for an all-round impressive brake package. An ergonomic brake lever and Haye's crosshair alignment system makes these brakes a breeze to get setup too.

Making power is easy. Making power with the right feel, that was our challenge. We did this by creating an all-new system.Dominions 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.

The 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.

Pad Material: T106 Semi-Metallic (Included), T100 Sintered Metallic (Included)

Reach Adjust: Tool Free

Pad Contact Adjust: Tooled

Lever Pivot: Sealed Cartridge Bearings

Pad Retention: King Pin

Bleed: 2-Stroke Dual Port Bleed System

Fluid: Hayes DOT 5.1

Graphics: Laser Etch

Alignment: Crosshair

At the bikerack we also keep a broad range of hayes wear and tear items and spares such as hose kits, brake pads, brake adapters, rotors and more in stock. so you can keep your hayes brakes refreshed and serviced.