The Hayes Dominion A4 is built for riders who demand maximum control when the trail gets steep, fast and technical.
With a powerful 4-piston design, race-focused ergonomics and precise modulation, the Dominion A4 delivers the kind of braking performance you can trust when you’re pushing your limits - from aggressive enduro laps to full-on downhill runs.
And yes, it looks as good as it performs. The Purple finish adds a distinctive touch to a high-performance cockpit without compromising the serious, race-ready character of the Dominion A4.
The Dominion A4 is designed around one simple principle: controlled power.
Instead of simply delivering maximum braking force, it gives you the control needed to use that power effectively. Strong initial bite, predictable modulation and consistent performance allow you to brake later, carry more confidence into technical sections and maintain better control throughout the run.
Why Dominion A4?
- 4-piston caliper for powerful, consistent braking
- Excellent modulation for precise speed control
- Race-focused performance for enduro and downhill
- Ergonomic lever design for confident one-finger braking
- Consistent braking feel throughout demanding rides
- Premium construction built for aggressive MTB use
- Purple finish for a distinctive custom-bike look
Features:
· Tool-Free Reach Adjustment
· Flip-Flop Lever design - the levers are symmetrical for both sides of the handlebars
· King Pin Pad Retention
· Crosshair Caliper Alignment
· Two-Stroke Dual-port bleed system
Specifications:
· 310g (180cm hose and mount hardware)
· DOT 5.1 Fluid
· Tool-Free Reach Adjustment
· 2-Stroke Dual Port Bleed System
· Sealed Cartridge Bearings Lever Pivot
· 180cm Hose Length Only
