Hayes Dominion A4 RRL

Normal Reach Lever

The main cylinder of the Dominion is factory-tuned for the shortest possible dead travel and a clear engagement point. The Dominion A4 brake caliper uses four pistons in a structurally stiff design. It features a cold-forged caliper and a KingPin pad retention screw that enhances rigidity.

With a motorsport-inspired two-stroke bleed system featuring two ports, industry-leading DOT 5.1 fluid, and a Kevlar hose, the hydraulic system is designed for ultimate performance at all temperatures and easy maintenance.

The Dominion A4 comes with the proprietary QuickBite system for fast and even pad engagement, paired with our D-Series rotor to manage heat with reduced brake noise. It is also available as an SRL (Short Reach Lever), ergonomically tailored to individual hands.

This price is for one brake. If you are looking for a set for front and rear, you will need to order two brakes. The Dominion features a flip lever and can therefore be used on either side. Rotors and mounts are not included.

Weight: 310 g (100 cm hose and mounting hardware)

Reach adjustment: Tool-free

Pad contact adjustment: Machined

Lever orientation: Flip-flop

Hose: Low expansion due to Kevlar fabric

Rotor: D-Series (160, 180, 203 with QuickBite and MRC)

Lever pivot point: Sealed industrial bearings

Pad material: T106 semi-metallic, T100 sintered metal

Pad insertion: Top loader

Pad retention: Pad pin

Fluid: Hayes DOT 5.1

Alignment: Crosshair.