Make sure your fit is dialed in your race against the clock! Bontrager's Speed Concept Stem allows you to set up your Speed Concept bike for proper ergonomics and aerodynamics. Plus, the precisely integrated design keeps your super aero bike fast and looking pro! - Low-Near = 17 rise / 77mm length - Low-Far = 100 rise / 110mm length - Mid-Near = 50 rise / 67mm length - Mid-Far = 45 rise / 110mm length - High-Near = 80 rise / 67mm length - High-Far = 75 rise / 110mm length