Hayes' award winning A4 (4 piston) Dominion brake Stealth (black/grey) caliper & lever Stealth grey lever with matte black caliper and lever body Standard Lever size (BFL) Optional add-on here if you want Limited Edition Hayes Purple levers instead of the Stealth grey levers Set (one end) with 180 cm hose for use on front or rear Piston caliper has cross-hair alignment Flippable lever with tooled reach adjustment Dead stroke is factory set Lifetime Leak-Proof Warranty - covers master cylinder and caliper Uses DOT 5.1 fluid Fits 74 mm post mount brackets and adapters Works best with Hayes D series rotors Stock brake hose is 5.5 mm diameter For frames requiring a smaller diameter or longer hose we have the Jagwire brake hose (5 mm diameter, 3 metre length) & adapter option available One 3 m Jagwire brake hose & quick-fit adapter kit is enough for one bicycle (brakes front & rear)
Use our Dominion Brake Builder to purchase your Hayes Dominion brake with rotors & adapters
In 1998 Hayes rocked the MTB world with their HFX-MAG disc brake and set the mounting standards used today. 20 years later, after 4 years of development and testing, they released the Dominion - a ground-up designed 4 piston brake offering immense power and control to take on the best brakes in the market today.
“Lever feel is comfortable with or without gloves and its action is smoother than Shimano's or SRAM's best.”
“The Dominion's predictable pad contact and proportionate braking response provided next-level control during maximum braking events, especially where traction was iffy.”
“The Dominion brake is a winner in every sense . . . If you are in search of a good brake, start with this one.”
Making power is easy. Making power with the right feel, that was Hayes' challenge. Hayes 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 A4 Dominion calipers utilize four pistons in the most structurally rigid design. It features a cold-forged caliper and KingPin structural pad retention bolt.
With a motorsports inspired Two-Stroke dual port bleed system, industry leading DOT5.1 fluid and Kevlar hose, the hydraulic system is engineered for ultimate performance and easy maintenance.
Dominion A4 features the proprietary QuickBite2 system for fast and consistent burnish, coupled with the Hayes D-Series rotor to manage the heat, with less braking noise.
The Dominion A4 is available with Standard (BFL) or Small Form Levers (SFL; designed for smaller hands). This version has the BFL. SFL option is available on special order, contact us for info.