Redshift's Switch Aero System allows you to have a proper aero position on the road bike you already own. The system is comprised of Quick-Release Aerobars and a Dual-Position Seatpost. The Quick-Release Aerobars are different than any other aerobars on the market. The patented quick-release mechanism allows you to attach or remove the aerobars in a few seconds, without any tools. You can choose the best setup for every single ride. The patented Dual-Position Seatpost lets you ride a true aero position on a standard road bike, without sacrificing your normal road position. And you can switch between road and aero positions on-the-fly while riding so you can always choose the best riding position for every part of your ride. *stem sold separately Benefits: • Transform your current bike - switch from road to aero position on the bike you already own• No tools required - remove or attach the aerobars easily with the quick-release mechanism• Ride with ease - no more time and energy wasted switching from road bike to aero bike Quick-Release Aerobar Details: • Extensions are available in L-Bend or S-Bend • Massive adjustability lets you fine-tune your fit - extension length, armpad fore-aft, armpad width and height (Extension Riser Kit sold separately)• Secondary safety release mechanism prevents accidental release Dual-Position Seatpost Details: • Linkage design lets you switch between road and aero positions seamlessly while riding• Choose the best position for every single climb, flat, or descent• Maintain 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)• Check technical specifications for compatibility What's in the Box: • 1 x Dual-Position Seatpost • 1 x Quick-Release Aerobars (including Handlebar Clamps, Quick-Release Mechanisms, Aerobar Extensions, Armrest, Armrest Pads, and all required hardware