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