Hayes Dominion A4 Disc Brake System

Best Price At
Best Price At

DESCRIPTION

Making power is easy. Making power with the right feel, that was our challenge. We did this by creating an all new system. Dominions 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.

USER REVIEWS

Showing 1-2 of 2  
[Feb 04, 2021]
Sonoma_MTB


OVERALL
RATING
5
Strength:

easily the best brakes out there. excellent modulation with actual stopping power. lever feel is extremely light, bite point consistent, no brake fade. i have zero complaints.

Weakness:

hayes claims you should remove the brakes to bleed them. i've been bleeding them on the bike and they work perfectly so not sure how important that is.

Purchased:
New  
Model Year:
2020
[Feb 02, 2021]
monkies


OVERALL
RATING
4
Strength:

Probably the best feeling levers I've ever used. Compared to my SRAM Code RSCs (on 2 bikes), these felt like my fingers needed no effort to move the levers. The SRAMs are fantastic, but they are 'heavy' feeling when using...feels like molasses vs these Dominions. I've had Shimano XT and Zee, and couldn't stand the on/off feeling. These brakes made me a better rider because they were so sensitive throughout the whole range of use. The cross hair alignment made it super precise to align the caliper.

Weakness:

Alas it was too much of a pain to remove these for a bike sale, so I let them go. But in a sad way I'm ok with it due to a few weak points: - they require you to remove the brakes to bleed. This is absurd because so many bikes are internally routed now. - finding parts: you will barely find a bike shop that carries the hose, compression fittings, or even pads. If you're in a pinch, you'll be out of luck. - caliper adapter - you wont be able to throw on your old Shimano adapter laying around. I had to order a Magura adaptor because the size of the caliper. - rotors - yes, the rotors are also thicker, so there goes the concept of using whatever is around. - lever throw - once the pad wore down, the piston didn't seem to also move to compensate. I thought I had a very bad bleed. Put in new pads and back to normal. The lever throw goes with all brakes I've used as the pads wear, but these were so drastic. I hope the next generation of these addresses these issues, because the lever is so fantastic that I still miss these brakes.

Purchased:
New  
Model Year:
2020
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