Hayes Dominion A2 Hydraulic Brake Kit with Short Reach Lever - Single Brake for XC Trail Riding

The Hayes Dominion A2 Brake Kit is engineered to meet the demands of Cross Country and Trail riders who prioritise precision, reliability, and superior stopping power. Building upon the proven performance of the Dominion A4, this brake kit incorporates a compact two-piston caliper designed to deliver powerful braking without unnecessary bulk. Its master cylinder is factory-tuned to provide the shortest dead stroke and a crisp, responsive bite point, ensuring riders maintain exceptional control across diverse terrain and conditions.

Crafted with a cold-forged caliper and reinforced by a KingPin structural pad retention bolt, the Dominion A2 offers enhanced stiffness and long-lasting durability. The motorsports-inspired Two-Stroke dual port bleed system, combined with industry-leading DOT 5.1 fluid and Kevlar hose, guarantees consistent hydraulic performance across all temperatures and simplifies maintenance procedures. Additionally, the QuickBite² system and D-Series rotor optimise heat management and reduce braking noise, delivering a smooth and consistent ride experience. Explore more from the Brake Kits category to find complementary components and upgrades.

Designed with ergonomic precision, the Short Reach Lever (SRL) caters to riders with smaller hands or those who prefer a shorter lever reach. It features tool-free reach adjustment and flip-flop lever orientation, allowing personalised comfort and control without the need for additional tools. This brake kit exemplifies a balance between advanced technology and practical design, elevating the performance and reliability of your mountain biking setup.

Key Features & Benefits

• Compact Two-Piston Caliper: Delivers powerful braking performance with reduced bulk for agile handling.
• Cold-Forged Caliper & KingPin Bolt: Provides superior stiffness and enhanced durability under demanding conditions.
• Two-Stroke Dual Port Bleed System: Simplifies maintenance and ensures consistent hydraulic performance using DOT 5.1 fluid and Kevlar hose.
• QuickBite² System with D-Series Rotor: Optimises heat dissipation and minimises braking noise for a smooth, reliable ride.
• Ergonomic Short Reach Lever (SRL): Offers tool-free reach adjustment and flip-flop lever orientation for customised rider comfort.

What It’s Good For

• Cross Country and Trail riders requiring dependable, powerful braking systems.
• Riders with smaller hands or those who prefer ergonomically shorter lever reach.
• Users seeking easy maintenance with an advanced dual port bleed system.
• Cyclists prioritising consistent, noise-reduced braking performance.
• Those needing effective heat management during extended descents.

What It’s NOT Good For

• Riders requiring four-piston calipers for extreme downhill or aggressive braking demands.
• Users preferring mechanical brake kits or non-hydraulic systems.
• Individuals needing longer reach levers designed for larger hand sizes.
• Applications outside mountain biking or trail riding environments.

Frequently Asked Questions

Is this brake kit suitable for different rider sizes or preferences?
The Dominion A2 is compatible with a range of rider hand sizes thanks to its Short Reach Lever featuring tool-free reach adjustment and flip-flop orientation, accommodating personalised comfort and control.

What key accessories or add-ons complement this model?
To maximise performance, consider pairing the Dominion A2 with high-quality brake pads, compatible rotors, and protective gear such as helmets and gloves. Explore our collections for brake pads, rotors, and helmets to enhance your riding setup.