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Dominion A4 Brakes

Hayes Dominion A4

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 Dominion A4 caliper utilizes 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.

Hayes Dominion A4 FeaturesHayes Dominion A4 FeaturesHayes Dominion A4 Features

Set Descending Direction

15 Item(s)

  1. Pair of Limited Edition Purple Hayes levers
    Lever only, brake set not included
    Standard lever size (BFL) Learn More
  2. Hayes Dominion Bronze Brake Set Front

    From: US$300.79

    To: US$376.23

    Hayes' award winning Dominion brake
    Available as A4 (4 piston) or A2 (2 piston)
    Bronze lever & caliper with black lever body
    Optional add-on here if you want Limited Edition Hayes Purple levers instead of the bronze levers
    Front set with shorter (100 cm) hose
    Piston caliper with cross-hair alignment
    Flippable lever with tooled reach adjustment
    Option of Regular (BFL) or Small Form Lever (SFL; designed for smaller hands)
    Small Form Levers are designed for anyone with smaller hands (not just junior riders) - Ellen at Shockcraft/Biken uses SFL on her Dominion brakes
    Dead stroke is factory set
    Lifetime Leak-Proof Warranty - covers master cylinder and caliper
    Pre-bled with 100 cm hose for front use
    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 Learn More
  3. Hayes' award winning A4 (4 piston) Dominion brake
    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
    Rear set with longer (180 cm) hose
    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
    Pre-bled with 180 cm hose for rear use
    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 Learn More
  4. 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
    Rear set with longer (180 cm) hose
    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
    Pre-bled with 180 cm hose for rear use
    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 Learn More
  5. Hayes' award winning Dominion A4 Brake
    Stealth grey levers with matte black calipers and lever bodies
    Optional add-on here if you want Limited Edition Hayes Purple levers instead of the Stealth grey levers
    Standard lever size (BFL)
    Piston caliper with cross-hair alignment
    Flippable lever with reach adjustment
    Dead stroke is factory set
    Pre-bled with 90 cm hose for front use
    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 this brake builder to select the brakes, rotors, adapters that you need for easy fit to your bike

    Learn More
  6. Hayes Dominion Bronze Brake Set Rear

    From: US$300.79

    To: US$376.23

    Hayes' award winning Dominion brake
    Available as A4 (4 piston) or A2 (2 piston)
    Bronze lever & caliper with black lever body
    Optional add-on here if you want Limited Edition Hayes Purple levers instead of the bronze levers
    Rear set with longer (180 cm) hose
    Piston caliper has cross-hair alignment
    Flippable lever with tooled reach adjustment
    Option of Standard (BFL) or Small Form Lever (SFL; designed for smaller hands)
    Small Form Levers are designed for anyone with smaller hands (not just junior riders) - Ellen at Shockcraft/Biken uses SFL on her Dominion brakes
    Dead stroke is factory set
    Lifetime Leak-Proof Warranty - covers master cylinder and caliper
    Pre-bled with 180 cm hose for rear use
    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 Learn More
  7. Hayes Dominion T4 Titanium Brake Set Front

    US$473.97

    Special Order ex-USA

    The limited-edition Hayes Dominion T4 packs the power, sensitivity, and reliability the Dominion family is know for into its lightest chassis yet.
    Dominion T4 features a Reynolds designed and in-house produced carbon-fibre lever, titanium hardware, composite reservoir cover, pads with aluminium backing plates and precise weight-reducing machining.

    Front set with shorter (100 cm) K2 hose
    Piston caliper with cross-hair alignment
    Tooled pad contact adjustment
    Flippable lever with tooled reach adjustment
    Dead stroke is factory set
    Pre-bled with 100 cm hose for front use
    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 T4 Brake Builder to purchase your Hayes Dominion T4 brake with rotors & adapters Learn More
  8. Hayes Dominion T4 Titanium Brake Set Rear

    US$473.97

    Special Order ex-USA

    The limited-edition Hayes Dominion T4 packs the power, sensitivity, and reliability the Dominion family is know for into its lightest chassis yet.
    Dominion T4 features a Reynolds designed and in-house produced carbon-fibre lever, titanium hardware, composite reservoir cover, pads with aluminium backing plates and precise weight-reducing machining.

    Rear set with longer (180 cm) K2 hose
    Piston caliper with cross-hair alignment
    Tooled pad contact adjustment
    Flippable lever with tooled reach adjustment
    Dead stroke is factory set
    Pre-bled with 180 cm hose for rear use
    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 T4 Brake Builder to purchase your Hayes Dominion T4 brake with rotors & adapters Learn More
  9. Dominion A4 Complete Caliper Black (Hayes)

    US$156.62

    Backorder ex-USA

    Replacement Dominion A4 complete caliper, black

    Hayes Part Code: 98-36139-K002 Learn More
  10. Dominion A4 Complete Caliper Bronze (Hayes)

    US$156.62

    Backorder ex-USA

    Replacement Dominion A4 complete caliper, bronze

    Hayes Part Code: 98-36139-K001 Learn More
  11. Hayes Dominion Lever Assembly
    Includes master cylinder and lever blade
    Lever is SFL type (Small Form Lever) for smaller hands
    Small Form Levers are designed for anyone with smaller hands (not just junior riders) - Ellen at Shockcraft/Biken uses SFL on her Dominion brakes
    Same part for left and right
    Lever blade can be swapped to larger size
    Width of SFL blade is 11.5 mm (BFL blade is 15 mm wide)

    Hayes Part Number:  98-36118-K101 Learn More
  12. Replacement Small Form Lever (SFL) for Dominion brakes, A2 or A4
    Small Form Levers are designed for anyone with smaller hands (not just junior riders) - Ellen at Shockcraft/Biken uses SFL on her Dominion brakes
    Flippable lever, will fit left or right side
    Bronze
    Lever only
    Width of SFL blade is 11.5 mm (BFL blade is 15 mm wide)

    Hayes Part Code: 98-36117-K101 Learn More
  13. Replacement standard lever (BFL) for Dominion brakes, A2 or A4
    Flippable lever, will fit left or right side
    Bronze
    Lever only
    Width of BFL blade is 15 mm (SFL blade is 11.5 mm wide)

    Hayes Part Code: 98-36117-K001 Learn More
  14. Allows fitment of Shimano Ispec II/EV shifters to Hayes brakes

    Hayes Part Code: 98-36137-K001

    Learn More
  15. Dominion/SRAM Peacemaker Clamp (Hayes)

    US$53.63

    Available on backorder

    Allows fitment of SRAM Matchmaker shifters to Hayes brakes

    Hayes Part Code:  98-36137-K002 Learn More

Set Descending Direction

15 Item(s)