Hayes Dominion A4 Disc Brake

The Hayes Dominion A4 Disc Brake combines motorsports-inspired engineering with trail-crushing performance, featuring a factory-tuned master cylinder that delivers the crispest bite point imaginable. Its cold-forged four-piston caliper and proprietary QuickBite² system provide consistent stopping power on rowdy terrain, giving you the confidence you need to tackle bigger, badder trails.

Low Input, High Fidelity
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Low effort system with predictable, progressive ramp up and a crisp bite point.

Reduced Friction
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A featherlight lever feel is acheived through a combination of an added glide ring on the piston and sealed ball bearings at the lever blade pivot

Precise Engagement
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Each Dominion is factory set to have the lowest dead stroke possible and a crisp bite point.

Built To Last
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Metal pistons are used to ensure that no matter the terrain or temperature your brake will continue to perform as it did on the first ride.

Lever

Tool-Free Reach Adjustment
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Adjust your lever reach with ease while on the trail thanks to an intuive adjustment knob design.

Flip-Flop Lever Orientation

Sealed Cartridge Bearings Lever Pivot

Caliper

King Pin Pad Retention

Crosshair Caliper Alignment

Piston Diameter
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17mm

Additional Features

Two-Stroke Dual-Port Bleed System

Two Sets of Pads Included

DOT 5.1 Fluid

180cm Hose Length

Specs

• Biking Type:
  Mountain

  More

  Biking Type

  Mountain
  Mountain bikes are built for tackling rough terrain with frames made of durable materials like aluminum or carbon fiber, ensuring stability and maneuverability. They feature suspension to absorb impacts from rocks, roots, and drops, providing a smoother ride.

• Rotor Included:
  No

• Warranty:
  2 Years