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Hayes Disc Brakes | Dominion A4 Brake - 100cm / Regular / Stealth Black / Grey
Hayes Disc Brakes | Dominion A4 Brake - 100cm / Regular / Bronze
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -
Hayes Disc Brakes | Dominion A4 Brake -

Dominion A4 Brake

95-36115-K003-D

Regular price$249.99
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Description

Introducing the all-new, Stealth Dominion, our award-winning Hayes Dominion A4 brakes are back – adding even more ways for you to stop!

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.

Available in SFL (Small Finger Lever) - ergonomically tailored for the smaller hand.

•Tool-Free Reach Adjustment
•Flip-Flop Lever Orientation
•King Pin Pad Retention
•Crosshair Caliper Alignment
•Two-Stroke Dual-port bleed system

•310g (100cm hose and mount hardware)
•DOT 5.1 Fluid
•Tool-Free Reach Adjustment
•2-Stroke Dual Port Bleed System
•Sealed Cartridge Bearings Lever Pivot
•100cm Front Hose Length
•180cm Rear Hose Length

Dominion In The News

"The Dominion brake is a winner in every sense.. If you are in search of a good brake, start with this one"

"I was pleasantly surprised by the Dominion A4 brake and I think most riders will be as well"

"I find myself recommending these to everyone that sees them on the trail."

The Lost Co Logo

"Overall, the Hayes Dominion’s performance was very impressive indeed, descent after descent we encountered nothing but consistent and precise braking."

Enduro MTB Magazine

Rotors and Brackets not included

Get everything you need!


Low Input - High Fidelity (LoFi)

Low effort system with predictable, progressive ramp up and a crisp bite point.

Loaded With Tech

Reduced Friction - A featherlight lever feel is acheived through a combination of an added glide ring on the piston and sealed ball bearings at the lever blade pivot
SRL - Our Stable Rate Link delivers a consistent lever ratio regardless of reach
Precise Engagement - Each Dominion is factory set to have the lowest dead stroke possible and a crisp bite point.
Built to last - Metal pistons are used to ensure that no matter the terrain or temperature your brake will continue to perform as it did on the first ride
Adjustable Reach - Adjust your lever reach with ease while on the trail thanks to an intuive adjustment knob design

Hayes A-Series Brakes

Modal Resonance Cancellation (MRC)

FEA-optimized modal shapes of D-Series rotors are intentionally designed to oppose those of Semi-Met T106 and Sintered T100 pads, canceling out noise and vibration.


Crosshair Caliper Alignment screws allow for quick and accurate setup.

King Pin pad retention bolt adds strength.

2-Stroke dual port bleed system for maximum bleed integrity.

Customer Reviews

Based on 41 reviews
90%
(37)
5%
(2)
5%
(2)
0%
(0)
0%
(0)
T
Tom and Diana Settle
Hayes Dominion King of The Stoppers

I have 3 E bikes and I weight in excess of 200lbs so braking is very important to me. I like a great grabbing hard biting brake and my Dominion A4 that I just purchased provide MORE than enough. I have TRP brakes on my other Ebikes and will be changing them over to the Hayes in the very near future. The TRPs are good, but I just like the power and light touch of the Hayes a bit better. If ya like easy pull brakes with great power and bite, these are the brakes for you. I opted for the 220 rotors.

M
Micah Pearlman
Fantastic

Really fantastic brakes. Stopping power is the best I've had -- and I've tried Hope E3 (2nd best), Magura MT7 (could never get them to work consistently and lever is terrible), Shimano SLX (pretty good power, probably the best lever feel, but kept blowing seals), SRAM Code (just awful). Bleeding is pretty easy. Lever feel is fantastic.

p
paul potter
Great brakes

Great stopping power, slight issues with rubbing
Can someone tell me what the different pads u get are ?

D
D.P.
These brakes are awesome!

I recently purchased a pair of Hayes dominion A4s. Not only do these brakes look amazing, they feel INCREDIBLE! I just gave them a beating at my local DH bike park and with over 30 miles of downhill and some of the gnarliest tech in my area, these brakes were more than up for the job. Not once did they fade or lose any sort of power whatsoever. The amount of power that these brakes yield is undeniably amazing (I have been using the stock semi metallic pads and metallic pads are only going to make them more powerful), and with the lightest lever pull out there, you cant go wrong. The modulation on these things is awesome and I can demand as much power as I need all without skidding the back tire everywhere. The light lever action significantly reduces arm pump and allows you to ride harder for a longer period of time. Instillation process was as easy as any other brake and bleeding wasn't bad at all. I got my brakes to feel exactly how I wanted them with ease, and first try, no extra steps or fiddling around required like other brands out there. And with the use of DOT fluid these things will go strong for time and time again without needed bled unlike mineral oil brakes that usually require a full flush after a month of hard riding. These brakes bite the exact same way every time with no wandering bitepoint .Overall for the power, feel, look, and price, these are the BEST brakes on the market by far!!! Cannot recommend these brakes enough.

M
Marcela Capurro
Dominion 4 piston

These brakes are absolutely amazing up to this point. Just did over 1000miles of heavy downhill on a ebike. Haven’t heard any sounds or anything. I have felt maybe a little bit of less braking power after a very long run. (Only rear due to excessive use) I’ve had xtr 2020, mt7 2021, rsc for context… these are way more comfortable and on another level of power if compared to the RSC. I can even say that if you test these a few days it will be just hell to go back to the rsc. It’s that much more control hence speed.

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Dominion A4 in the News

“Gravity riders of all stripes will be stoked to squeeze these brakes."

--brian gerow, singletracks magazine, usa
Read the story here...

 

"With power to rival the best, superb build quality and class-leading feel, they are a highly recommended purchase for riders looking for a balanced brake with lots of sensitivity."

--trev worset, enduro magazine, germany
Read the story here...


Low Input - High Fidelity (LoFi)


Low effort system with predictable, progressive ramp up and a crisp bite point.

Loaded With Tech


Reduced Friction - A featherlight lever feel is acheived through a combination of an added glide ring on the piston and sealed ball bearings at the lever blade pivot

SRL - Our Stable Rate Link delivers a consistent lever ratio regardless of reach

Precise Engagement - Each Dominion is factory set to have the lowest dead stroke possible and a crisp bite point.

Built to last - Metal pistons are used to ensure that no matter the terrain or temperature your brake will continue to perform as it did on the first ride

Adjustable Reach - Adjust your lever reach with ease while on the trail thanks to an intuive adjustment knob design

Modal Resonance Cancellation (MRC)


FEA-optimized modal shapes of D-Series rotors are intentionally designed to oppose those of Semi-Met T106 and Sintered T100 pads, canceling out noise and vibration.

Crosshair Alignment System

Patented alignment screws allow for quick and accurate setup

King Pin
Pad retention bolt adds strength

2-Stroke Dual Port Bleed System
Dual port bleed port system for maximum bleed integrity.