Abstract: The invention detects variation in the speed of the bicycle's drive chain using a sensor. Variations in chain speed are measured, with the resulting numbers displayed to be visible to the cyclist in real-time and/or saved for later downloading and viewing via computer. Metrics that can be calculated using variations in chain speed include: a smoothness index, which indicates how evenly the cyclist is applying force/power; chain speed variation to show the contribution of each leg to the overall force/power delivered; pedaling cadence; and a calculation of gear ratios. Some of these metrics can use inputs from additional sensors, such as a cadence sensor that is tripped by each revolution of the bicycle's crank arm, and wheel speed or GPS sensor for measuring the bicycle's speed.

Abstract: The invention broadly describes a method and apparatus for mounting a handlebar extension assembly to a bicycle's existing handlebars. Such handlebar extensions are typically also used to support a cyclist's elbows and place the cyclist in a narrow, aerodynamic position. In the preferred embodiment, a unshaped handlebar extension attaches to the existing handlebars at two points, with one point to the right of the handlebar stem and the other point to the left of the handlebar stem. The handlebar extension has a third mounting point at the handlebar stem. The third mounting point prevents rotation of the handlebar extension around the primary handlebars. By mounting the extensions at three points, clamping mechanisms that are light in weight and convenient can be used.