Lightweight frame featuring 30T hybrid composite technology SHIFT + Technology Boat tail cross sections increase aero efficiency, reduce frame flex and provide greater stability Leading edge absent/invisible chain-stay increases aero efficiency and drivetrain stiffness Static Downtube Orientation for maximum aerodynamic advantage across all sizes QBox increases aerodynamics with enhanced boat tail technology Multi system brake mount allows compatibility with most brakes Easy Assembly: 2 allen wrench sizes 6 position seatpost design SHIFT+ Technology: QR’s unique “shift” aero design was first introduced in the CD0.1 and further refined in our PR series. Shift + offsets the Static Aero Downtube towards the drive side of the bike thus redirecting the concentrated airflow away from the ‘dirty’ (drive side) to the ‘clean’ side (non-drive side) of the bike. This minimizes drag and makes the drivetrain virtually invisible to the wind. The result is a bike that is more stable and more aerodynamic across a wider range of yaw angles. Athletes find that Shift + helps stabilize the bike in cross winds which saves them energy on the bike to use on the run. Boat Tail Airfoil: Used in ballistics technology and the automobile industry, Boat Tail Airfoils are more stable and more aerodynamic than Kamm Tail airfoils while still maintaining effectiveness over a wider range of yaw angles than traditional airfoil shapes. The boat tail shape reduces swirling air pockets off the back of each aero tube thus reducing drag and stabilizing the bike. Static Down-tube Orientation: Wind tunnel testing has shown that dropping the down-tube as close as possible to the trailing edge of the front wheel improves aerodynamics.