With possible gear ratios of 41.7:1 and 64.8:1, the high-power gearbox is well-suited for most vehicles that require a balance of speed and torque.
Tamiya 70103 Universal Gearbox Assembly Kit (japan import), Pots & Pans - Canada
Tamiya 72002 High-Speed Gearbox Kit, POLOLU-71
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TAMIYA 72003 HIGH POWER GEARBOX H.E. HIGH EFFICIENCY
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Tamiya High Power Gear Box H.E. TAM720 NEW
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Tamiya Motors and Gearboxes - Page 2 - Robot Gear Australia