The key to riding powerfully and comfortably with aerobars is proper saddle position. The forward position of the dual-position seatpost allows you to ride with proper aero bike fit on a standard road bike, letting you ride faster and more comfortably. And since you can switch between road and aero positions on-the-fly while riding, you can always choose the best riding position for every part of your ride.Key Features:Linkage design lets you switch between road and aero positions seamlessly on-the-fly while riding.Choose the best position for every single climb, flat, or descent.Linkage design maintains proper leg extension in both road and aero positions.Saddle moves forward 50mm, corresponding to approximately 4 degrees of effective seat tube angle change.Aero road riding position optimized for proper handling on a road bike.Simple, durable two-bolt saddle clamp allows infinite saddle tilt adjustment and reliable clamping.16mm rearward setback (road position).Legal for use in all I