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Making power is easy. Making power with the right feel, that was our challenge. We did this by creating an all-new system. 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. Dominion A4 features the proprietary QuickBite² system for fast and consistent burnish, coupled with our D-Series rotor to manage the heat with less braking noise.
Cartridge-bearings used in the brake lever
Aluminum piston operates smoothly across operating temperatures
Piston glide ring technology pioneered in suspension forks
Caliper: Two Stroke Dual caliper bleed ports for maximum bleed integrity
KingPin Structural caliper pad pin
Crosshair Caliper Alignment System: Dramatically simplifies caliper installment and alignment
Patented Crosshair caliper alignment screws
Allows mechanics and end users to quickly and accurately set brake caliper with no rubbing of the rotor on the pads
Eliminates guesswork and trial and error
Makes set up process quick and easy for out of the box build
QuickBite² Offers riders the shortest path to high performance
1 reviews for Hayes Dominion A4 disc brake black/bronze with an average rating of 5/5 points.
Amazing brakes, especially modulation I've heard great things about these brakes. I'm a bigger guy and a friend of mine who is also a large dude said the modulation and stopping power of these brakes are awesome, so I'm going to buy a pair. I'll be putting on a 203mm rotor on the front and 180mm on the rear. ★★★★★ TimW