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With the Automatic Gear Transmission (AGT), JD introduces a revolutionary new automatic shifting system that is specifically designed for TranzX PST energized e-bikes. A choice of either automatic or semi-automatic shift modes provides a superior and effortless riding experience while improving the e-bike's energy efficiency. AGT technology optimizes the power ratio, achieving higher throughput and greater range. Perfectly integrated into the TranzX PST drive system, the computer-controlled system automatically changes gears at the right points to assure optimal power support. AGT is compatible with coaster breaks.