The majority of bicycle derailleur systems in use today are based on the same technology used over a century ago. This technology has made large strides in improvement over that time period, yet limitations remain. The derailleur is expensive, prone to damage, requires regular maintenance, and is a significant portion of a bike’s overall weight. Continuously Variable Transmission (CVT) technology could resolve many, if not all, of those limitations. CVT systems are commonly used in small motorized vehicles, such as go-karts or snowmobiles, and is becoming increasingly popular in the automotive industry. This research explores the application of CVT technology to a bicycle. Proto-typing and testing was conducted to understand the functionality, reliability, and feasibility of the design.

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