From racing, to touring, to commuting, Boardman's CX frames are designed with all the details that make each ride a delight. Boardman used the latest in frame and component technology to create three levels of frames that cater to any rider at any level. The CXR 9. 4S is Boardman's mid level Di2 model all the bells and whistles you could want, for any ride or race. The CXR was developed using the SLR frame as its inspiration. Every tube was meticulously examined and tested to be the most efficient and lightweight as possible. Using the latest Finite Element Analysis FEA, Boardman was able to test many different combinations of fiber types, fiber directions, resins, and tube shapes to ultimately come up with the CXR frame design. With the main load path in any bicycle running from the head tube, down the down tube, and then through the bottom bracket and drive side chainstay, Boardman zeroed in on these critical areas to add material where it's needed and remove it where it's not. The oversized nature of the down tube keeps the steering sharp, with the oversized bottom bracket handling pedaling forces. The material selected for the CXR's frame is an ultralight, high modulus unidirectional carbon fiber, constructed in a full monocoque design. Similarly, the fork was built out of the same predictable, race tested, and ultralight carbon fiber. The CXR's mold incorporates a one piece PF30 bottom bracket and oversized, asymmetric chainstays, which assist in both power transfer to the drivetrain as well as increased braking capabilities. Along these lines, the full carbon fork was built with a 1 12 to 1 18in tapered steerer for increased stiffness and steering precision. The CXR's fork was designed to be exceptionally stable, comfortable, and to efficiently handle variable wind conditions. Boardman factored in that both the proximity and movement of the wheel affect the fork's ability to reduce wind resistance, which is why its blades were computer mode...