The Quick-Release Aerobars let you switch from road to aero on-the-fly on the bike you already own. The patented quick-release mechanism allows you to attach or remove the aerobars in a few seconds without any tools so you can choose the best riding position for any ride. Along with the Dual-Position Seatpost, this system provides an optimized aero riding position on your road bike. 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 Details: • Extensions are available in Aluminum and Carbon, as well as 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 What's in the Box: • Handlebar Clamps • Quick-Release Mechanisms • Aerobar Extensions, Armrest, and Armrest Pads • All required hardware Technical Specs Weight 564 g/pr Carbon S-Bend570 g/pr Carbon L-Bend Pad Height (A) Minimum - 70 mmMaximum - 100 mm (with two stack spacers - sold separately as Extension Riser Kit) Pad Setback (B) Minimum - 30 mmMaximum - 81 mm Pad Width (C) Minimum - 108 mmMaximum - 165 mm Extension Length (D) 362 mm S-bend368 mm L-bend Extension Rise (E) 50 mm S-bend100 mm L-bend Extension Diameter (F) 22.2 mm (compatible with industry-standard extensions) Handlebar Clamp Width (G) 22 mm Handlebar Diameter 31.8 mm compatible26.0 mm compatible (with shims - sold separately)