Hayes Dominion A4 Hydraulic Disc Brake

• Each master cylinder is factory-tuned for the shortest dead stroke possible and a crisp bite point, delivering precise engagement
• Caliper utilizes four pistons in the most structurally rigid design possible
• Features a cold-forged caliper and KingPin structural pad retention bolt that increases stiffness
• Proprietary QuickBite² system for fast and consistent burnish, coupled with our D-Series rotor to manage the heat with less braking noise
• Low-effort system with predictable, progressive ramp-up and a crisp bite point
• Featherlight lever feel is achieved through a combination of an added glide ring on the piston and sealed ball bearings at the lever blade pivot
• Stable Rate Link (SRL) delivers a consistent lever ratio regardless of reach
• Metal pistons ensure that no matter the terrain or temperature, your brake will continue to perform
• FEA-optimized D-Series rotors are designed to oppose modal shapes of Semi-Met T106 and Sintered T100 pads, canceling out noise and vibration
• Crosshair caliper alignment screws allow for quick and accurate setup
• 2-stroke dual-port bleed System
• Sealed cartridge bearings lever pivot
• Tool-free reach adjustment
• Flip-flop lever orientation
• Available in SFL (Small Finger Lever) - ergonomically tailored for the smaller hand
• Kevlar hose - 100cm front/180cm rear length (180cm only in Limited-Edition Purple)
• Lifetime Leakproof Warranty covering the master cylinder assembly and the caliper
• Two-year limited warranty against defects in material and/or workmanship
• Weight listed includes 180cm hose and mount hardware