The Hayes Dominion A4 Brake, offered in a limited-edition "Purple Hayes" colorway, combines predictable power with a crisp bite point. This performance brake features a low-effort system with progressive ramp-up and a featherlight lever feel, achieved by sealed ball bearings at the lever pivot and a glide ring on the piston.
Its robust design includes a cold-forged caliper with four pistons and a KingPin pad retention bolt for stiffness. The two-stroke dual port bleed system and DOT 5.1 fluid ensure consistent performance across temperatures. D-Series rotors and the QuickBite² system work together to manage heat and reduce braking noise.
Quick Facts
| Feature |
Specification |
| Weight |
310g (180cm hose and mount hardware) |
| Brake Fluid |
DOT 5.1 |
| Hose Length |
180cm |
| Bleed System |
Two-Stroke Dual-port |
| Lever Adjustment |
Tool-Free Reach |
| Hose Material |
Kevlar |