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The upper forefoot buckle over the instep can be mounted in three different positions based on the needs of the foot, which allows for slightly different tensioning pressure, angle, and location over the instep

Gyro compatibility allows clean bar spins and precise handling, giving riders the setup they need to progress their tricks and stay in control through every line

Allen, Human Power (Fall/Winter 1991-1992) Design and development of a human-powered machine for the manufacture of lime-flyash-sand bricks, J.P.Modak & S.D.Moghe, Human Power (Spring 1998) Human Powered Flywheel Motor: concept, design, dynamics and applications, J.P.Modak, 2007 Modern mechanism: exhibiting the latest progress in machines, motors, and the transmission of power, Benjamin Park, 1892 Make electricity while you exercise, Mother Earth News, 2008 Luthers tool grinders (pdf, 5.8 MB), hand and foot powered grinders catalog

All e-bikes have a weight limit of 300 lbs

Electric parts, maybe even plant and flower seeds!