Hayes Limited Edition "Purple Hayes" Dominion A4 Disc Brake and Lever

Tomorrow is better when you build on experience and success from the past to reach new heights. We did just that with a limited-edition release of the Hayes Dominion A4 “Purple Hayes”. The purple colorway is a testament to the early days of mountain biking that saw Hayes bring technology to the world that forever changed our sport. The early editions of Hayes disc brakes were both groundbreaking and disruptive. To celebrate such a fantastic ride, a quarter century of molding the definition of fantastic braking performance for mountain biking, we are proud to introduce a limited run of the highest-performing brake to date, the Dominion A4, in a colorway that recalls perhaps the brand’s most iconic and visually striking model.

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.

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

Specifications:
- 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