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)