Hayes Dominion A4 Hydraulic Disc Brake (Black/Grey) (Post Mount) (Left) (Caliper Included)

Hayes Dominion A4 Hydraulic Disc Brake (Black/Grey) (Post Mount) (Left)
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Price: $249.99

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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.


  • 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

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: Handlebar (22.2mm)
Color: Black
Weight: 310g (Left)

This product was added to our catalog on December 7, 2021