Hayes Dominion A4 4-Piston Disc Brakes

Designed with a specific lever pull curve to balance on-demand pressure modulation, providing firm engagement between the pads and rotors, optimized for the world’s most demanding conditions and riders

• Four piston brake developed specifically for the rigors of DH and enduro
• Low-effort lever input (LoFi) for excellent braking feel and control
• QuickBite2 specific pad compounds paired with the Hayes D-series rotors deliver fast, consistent braking performance across all temperature and speed conditions
• Hayes K2 hose is contructed from woven Kevlar to provide the stiffest hose possible for maximum power transmission
• Features a cold-forged caliper and KingPin structural pad retention bolt that increases stiffness.
• Utilizes 17mm Pistions for maximum rigidity
• Both pad compounds are included: Semi-Metallic T106 (standard) and Sintered T100 (wet conditions)
• Uses DOT 5.1 brake fliud due to its high boiling point and consistency
• Crosshair Caliper Alignment System – Dramatically simplifies caliper installment and alignment MRC (Modal Resonance Cancelation) – Rotor harmonic design cancels out noise and vibration translating into more consistent braking
• Flip-Flop Lever Orientation. Can be used for front or rear
• Small Reach Lever (SRL) Version: designed specifically for riders with smaller hands
• Rotors and adapters sold separately
• Brake Caliper Type: 74mm Post Mount
• Adjustable Contact Point: Yes
• Designed for ebike: Yes
• Rotor: sold separately
• Weight: 310g. (90cm hose and mount hardware)