Abstract: An aerodynamic racing bicycle is provided. The racing bicycle may have a rear rim brake positioned below a drive portion of a chain and above a chain stay for reducing the aerodynamic drag on the bicycle.

Abstract: The bicycle may have a frame and a seat post. A cross section of the seat post may have an airfoil shape wherein a leading surface is sharper (i.e. less round) compared to prior art airfoil shaped bicycle frames. Additionally, a maximum thickness of the airfoil shape may be located more rearward compared to prior art airfoil shaped bicycle frames and bicycle front forks. This configuration may provide for a reduction in drag. A battery pack may be mounted to a rear side of the seat post.

Abstract: An aerodynamic brake booster stiffening plate is provided which attaches to pivot posts of a center pull brake system. The aerodynamic brake booster stiffening plate mitigates outward bending of the posts upon actuation of the brake to allow for faster brake response times. Additionally, a front surface of the aerodynamic stiffening plate may be aerodynamically shaped and blended with the fork or frame of the bicycle to encourage a laminar flow of air past the brake.

Abstract: An aerodynamic racing bicycle is provided. The racing bicycle may have a rear rim brake positioned below a drive portion of a chain and above a chain stay for reducing the aerodynamic drag on the bicycle.

Abstract: A bottom bracket assembly for a bicycle is provided. The bottom bracket assembly may comprise a left bearing, bottom bracket shell and a right bearing. The bottom bracket shell may be threadless and have beveled surfaces for mounting the left and right bearings onto the bottom bracket assembly. A spindle is inserted through the bottom bracket shell. Thereafter, the left and right bearings are preloaded to align the central axis of the spindle to the crankarm rotating axis such that the spindle or left and right crankarms do not wobble and yet do not bind when rotated.

Abstract: A bicycle front end assembly is provided which is configured to reduce aerodynamic drag. In particular, an axis shaft of a fork may be mounted to a head tube of a bicycle frame. A fork head may be disposed in front of the head tube for providing a front end assembly which is aerodynamically configured while providing an increased moment of inertia compared with traditional designs to reduce drag of the bicycle and increase steering stiffness. Also, the handlebar may be attached to the fork head such that when the bicycle is steered to the left, the fork head is rotated toward the left and when the bicycle is steered to the right, the fork head is rotated toward the right. In this manner, the fork head is alignable to the travel direction of the bicycle.

Abstract: A rear suspension of a bicycle may have an upper link and lower link which are pivotally connected to both a front frame and a rear frame of the bicycle such that the rear frame may rotate up and down about the front frame/front sprocket. A shock absorber may be pivotally connected to the upper link to absorb any impact forces imposed on the rear wheel and transferred to the upper link as the rear frame rotates up and down. Also, the upper link may be interconnected to the lower link with a tie link which allows the upper and lower links to work in conjunction with each other such that pedal setback is negligible when the rear wheel rides over bumps along the bike trail. Additionally, the tie link equalizes the forces caused by the rider's weight and pedaling forces.