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Dominion A4 Brakes
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 our D-Series rotor to manage the heat, with less braking noise.
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Hayes Dominion A4 Purple BrakeLimited edition Purple Hayes are back - the original Hayes A4 Dominion with purple levers & caliper
Purple Hayes pays homage to the legendary Purple Hayes from 2000
It links over 2 decades of brake development back to the original Hayes Disc Brakes, which are still competitive today
To celebrate such a fantastic ride and a quarter century of moulding the definition of fantastic braking performance for mountain biking, Hayes has produced a limited run of the highest performing brake to date, the Dominion A4
Each end has a longer (180 cm) hose for use on front or rear
Piston caliper with 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
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) Learn MoreAs low as US$0.00
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Hayes Dominion A4 Stealth Brake Set - One EndHayes' 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 Learn MoreUS$240.34 -
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Hayes Dominion Bronze Brake Set FrontHayes' 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 MoreFrom US$240.33
To US$300.61
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Hayes Dominion Bronze Brake Set RearHayes' 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 MoreFrom US$240.33
To US$300.61
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D Series Brake Rotor 203 mm (Hayes)203 mm (8") Rotor D series for Hayes Dominion
Learn More
Designed to minimise noise making harmonics
Works with all Hayes brakes
6 bolt mounting
Supplied with T25 mounting screws & T25 wrench
Hayes Part Code: 98-36153-K001US$60.93 -
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D Series Brake Rotor 180 mm (Hayes)180 mm (7") Rotor D series for Hayes Dominion
Learn More
Designed to minimise noise making harmonics
Works with all Hayes brakes
6 bolt mounting
Supplied with T25 mounting screws & T25 wrench
Hayes Part Code: 98-36153-K002US$60.93 -
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D Series Brake Rotor 160 mm (Hayes)160 mm (6") Rotor D series for Hayes Dominion
Learn More
Designed to minimise noise making harmonics
Works with all Hayes brakes
6 bolt mounting
Supplied with T25 mounting screws & T25 wrench
Hayes Part Code: 98-36153-K003US$60.93 -
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Dominion Brake Lever (SFL, Bronze) with Master Cylinder Assembly (Hayes)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 MoreUS$155.01 -
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Dominion Brake Lever, SFL, Bronze (Hayes)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 MoreUS$63.72 -
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Dominion Brake Lever, BFL, Bronze (Hayes)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 MoreUS$63.72 -
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D Series Brake Rotor 220 mm (Hayes)220 mm (9") Rotor D-series for Hayes Dominion
Designed to minimise noise making harmonics
Works with all Hayes brakes
6 bolt mounting
Supplied with T25 mounting screws
Hayes Part Code: 98-36153-K004 Learn MoreAs low as US$60.93
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Dominion/Shimano I-Spec II/EV Clamp (Hayes)Allows fitment of Shimano Ispec II/EV shifters to Hayes brakes
Learn More
Hayes Part Code: 98-36137-K001US$42.85 -
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Dominion A4 T100 Sintered Metallic Brake Pads (Hayes)Replacement pads for Hayes Dominion A4 brakes with 4 piston calipers
Learn More
T100 sintered metallic compound for excellent life, power and fade resistance
Hayes Part Code: 98-36141-K001US$32.53 -
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Dominion A4 T106 Semi Metallic Brake Pads (Hayes)Replacement pads for Hayes Dominion A4 brakes with 4 piston calipers
Learn More
T106 semi metallic compound for quiet performance
Hayes Part Code: 98-36141-K002US$32.53
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