Hayes Dominion A4 Brakes

Hayes Dominion, our award-winning A4 brakes available in Stealth Black or Bronze – 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 Ø17mm 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.

Tomorrow is better when you build on experience and success from the past to reach new heights. We did just that with a limited-edition release of the Hayes Dominion A4 “Purple Hayes”. The purple colorway is a testament to the early days of mountain biking that saw Hayes bring technology to the world that forever changed our sport. The early editions of Hayes disc brakes were both groundbreaking and disruptive. To celebrate such a fantastic ride, a quarter century of molding the definition of fantastic braking performance for mountain biking, we are proud to introduce a limited run of the highest-performing brake to date, the Dominion A4, in a colorway that recalls perhaps the brand’s most iconic and visually striking model.

One single part number for both front and rear brake (180cm hose)

While the power, performance and reliability of the Hayes Dominion brakes are available to all, the PURPLE HAYES version of the iconic brakes is, as with dyed fabric reserved for historic royalty, available only to a select few. Official Hayes riders across all disciplines will compete with Purple Hayes, building up their bikes with a more visible badge of pride known as Dominion in the highly regarded purple. However, as brakes are produced for MTB royalty at the professional level, an additional quantity will be made available for a few lucky consumers who wish to not only ride the same quality as the pros, but desire to build their bike with a visual statement of their great taste in fantastic braking performance.

While available in all markets, the quantities of the Purple Hayes brakes are limited to the extra quantity associated with the athlete production run and as such will be sold in a first come first serve basis while supplies last. Official riders will always ride purple and every year we will make an extra few pair for those quick enough and proud enough to show off their great taste in performance brakes… if you have missed out this year, sign up immediately to be put on the list for notification prior to next year’s production run.

SKU: 95-36115-K004 (Stealth Black/Grey)
SKU: 95-36115-K002 (Bronze)
SKU: 95-36115-K006 (Purple)