Dominion A4 Disc Brake Set

What Our Gearhead® Experts Are Saying:

“I’ve run these on long descents where braking consistency really matters, and they stay calm and predictable the whole time. The lever feel is light but decisive, and the bite point stays exactly where you expect it. Once they’re set up, you honestly stop thinking about braking.”

When trails point straight down and speed builds faster than comfort, the Hayes Dominion A4 Brake Set gives us the confidence to stay committed. Built for riders who push hard and brake later, this four-piston system delivers controlled power that feels deliberate rather than abrupt, letting us focus on line choice instead of lever panic. From technical descents to full days in the bike park, the experience stays consistent and reassuring.

The lever system uses sealed cartridge bearings and a low-friction piston glide ring to reduce effort while maintaining a crisp, predictable bite point. Metal caliper pistons manage heat effectively for reliable performance across long descents, while Crosshair alignment and King Pin pad retention simplify setup and service. With tool-free reach adjustment and a refined hydraulic system, the Dominion A4 balances raw stopping force with exceptional modulation.