Photo insert; Bike repair workshop by Uganda Non-Motorized Transportation This post is part of series written by TreeHugger contributors about trading in your car for a bike for trips that are two miles or less in distance. The series is sponsored by the Clif 2-Mile Challenge . A human being can travel three times as fast on a bike, as they can walking, for the same expenditure of energy, making bicycles the
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The Heart of Bicycle Maintenance