Hayes Brake Dominion A4 Disc Brake, Front/Rear, Black/Gray

Enduro and gravity riders who want strong, consistent stopping power reach for the Hayes Dominion A4, a 4-piston disc brake. Four 17mm metal pistons per caliper generate the clamping force, running DOT 5.1 fluid through a Kevlar-reinforced hose for a firm lever feel on long descents.

The lever offers reach adjustment plus independent bite-point and contact tuning, and the motorsports-inspired Two-Stroke dual-port system makes bleeding straightforward. Sold as a single brake orderable front or rear, weighing around 303 to 310g up front without a rotor. Finished in Black/Gray Stealth.