Dominion A4 Hydraulic Disc Brake Description:

The Hayes Dominion A4 Hydraulic Disc Brakes are back and better than ever. 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.

Features:

• Tool-Free Reach Adjustment
• Flip-Flop Lever Orientation
• King Pin pad retention bolt adds strength
• Crosshair caliper alignment allow for quick and accurate setup
• Two-Stroke Dual-port bleed system for maximum bleed integrity

Specifications:

• Brake Type: Hydraulic
• Brake Fluid: DOT 5.1 Fluid
• Brake Mount: Post Mount
• Brake Pads: Semi-Metallic
• Hose Length: 1000mm (Left) | 1800mm (Right)
• Pistons: 4
• Lever Clamp: Split Clamp (22.2mm)
• Color: Black/Bronze
• Weight: 310g (Left)

This product was added to our catalog on February 13, 2025