Hayes Dominion A4 Hydraulic Brake Kit with Short Reach Lever – Single Brake System

Enhance your cycling experience with the Hayes Dominion A4 Brake Kit, engineered to deliver precise control and reliable stopping power. This advanced hydraulic brake system features a short reach lever, optimised for both comfort and immediate response, making it an essential upgrade for riders demanding consistent performance. Designed with a cold-forged four-piston caliper and KingPin structural pad retention bolt, it ensures exceptional stiffness and durability, meeting the rigorous standards of serious cyclists.

Incorporating motorsports-inspired technology, the Dominion A4 Brake Kit utilises a Two-Stroke dual-port bleed system paired with high-quality DOT 5.1 fluid, ensuring smooth, consistent braking across diverse conditions with minimal maintenance. The Kevlar™ hose enhances reliability, while the proprietary QuickBite² technology guarantees fast and consistent rotor engagement. Combined with the D-Series rotor, this system effectively manages heat and reduces noise, providing dependable braking performance on every ride. Explore more from Hayes and browse other premium brake systems designed for high-performance cycling.

Key Features & Benefits

• Short Reach Lever: Offers precise control and comfort with the shortest dead stroke and sharp bite point for immediate braking response.
• Cold-Forged Four-Piston Caliper: Delivers superior stiffness and durability, supported by the KingPin structural pad retention bolt for demanding riding conditions.
• Two-Stroke Dual-Port Bleed System: Ensures easy maintenance and consistent brake feel using high-quality DOT 5.1 fluid.
• Kevlar™ Hose: Provides enhanced reliability and durability under rigorous use.
• QuickBite² Technology: Guarantees fast and consistent rotor engagement for confident braking.
• D-Series Rotor: Effectively manages heat dissipation and reduces brake noise for smoother descents.
• Tool-Free Reach Adjustment & Flip-Flop Lever Orientation: Allows effortless customisation to suit rider preferences and hand sizes.

What It’s Good For

• Delivering precise and responsive braking control in mountain biking and off-road cycling.
• Maintaining consistent performance across varied weather and terrain conditions.
• Riders seeking durable, low-maintenance hydraulic brake systems.
• Customisable brake lever positioning for enhanced ergonomics and comfort.

What It’s NOT Good For

• Compatibility with non-Hayes or incompatible brake systems.
• Applications requiring long-reach brake levers.
• Riders preferring mechanical or non-hydraulic brake systems.
• Situations where frequent brake pad replacement is impractical.

Frequently Asked Questions

Is the Hayes Dominion A4 Brake Kit suitable for all bike types?
While primarily designed for mountain bikes and off-road use, this brake kit is optimised for hydraulic disc brake applications where reliable stopping power is essential. It may not be suitable for road bikes or bikes requiring different brake standards.

Can I adjust the lever reach without tools?
Yes, the kit features tool-free reach adjustment and flip-flop lever orientation, allowing riders to easily customise the brake lever position to fit various hand sizes and riding preferences.

What accessories complement this brake kit?
For optimal performance, consider pairing the Hayes Dominion A4 Brake Kit with compatible rotors, high-quality brake pads, and protective gear such as helmets and gloves. Explore our rotors, brake pads, and helmets collections for suitable add-ons.