Tamiya

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US$9.00
This set contains eight pulleys of different diameters for use with other Tamiya products.
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US$15.42
This includes seven pulleys of various sizes, a motor, and mounting parts. This set can be combined with a variety of Tamiya products.
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US$19.84
This is a versatile, high-efficiency gearbox that you can build in one of the following gear ratios: 11.6:1, 29.8:1, 76.5:1, 196.7:1, 505.9:1, and 1300.9:1. Whatever your application, chances are that one of the configurations will do the job.
Delivery within 2-3 weeks
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US$18.84
The primary feature is a worm gear, which locks the output shaft whenever the motor isn’t turning. The high gear ratios of 216:1 or 336:1 make this gearbox appropriate for small walking robots, lifting mechanisms, and other applications where high torque is desired.
Delivery within 2-3 weeks
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US$18.84
This high-power gearbox can be built in a gear ratio of 41.7:1 or 64.8:1, making it well-suited for most vehicles that require a balance of speed and torque.
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US$15.00
The Tamiya single gearbox is essentially half of the Tamiya 70168 double gearbox. The kit can be built with gear ratios of 12.7:1, 38:1, 115:1, and 344:1. There are two possible output axle locations (for any given gear ratio, only one output location is possible).
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US$18.06
This double gearbox packs two independent gear trains into a compact and affordable package that is great for small mobile robots. Each side can be assembled to have one of four gear ratios: 12.7:1, 38:1, 115:1, or 344:1.
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US$15.89
This gearbox has four possible gear ratios, including the highest gear ratio of Tamiya’s gearbox series, 5402:1. The other options are 126:1, 441:1, and 1543:1. This gearbox also features a worm gear, which locks the output shaft when the motor is not turning.
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US$16.79
Unlike the other gearboxes in Tamiya’s series, the universal gearbox has a thin metal frame, making it the smallest Tamiya gearbox. The final two gears are metal, making for a tough output. A worm gear allows for the high gear ratio options of 101:1, 269:1, and 719:1.
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US$10.91
This is essentially half of the twin-motor gearbox. The kit comes with enough parts so you can built the gearbox in any of three gear ratios (17:1, 58:1, and 204:1).
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US$25.78
The first in Tamiya’s “high efficiency” series, the planetary gearbox features two 4:1 and two 5:1 stages that can be combined in any way you like—you can even combine two kits to get really huge gear ratios. 
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US$4.96
These are a set of two durable, semi-pneumatic, Off-Road Tires. The thick tread is good for off-road conditions. No screws are necessary, just push them onto a shaft.
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US$4.96
This set consists of four truck tires with wheels for construction and robotic projects.The hex shaft inserts directly into the wheel with no tools. This tire set installs directly onto many of Tamiya's gearbox shafts.
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US$8.93
This set contains two attractive racing-style wheels, each 56 mm in diameter and 25 mm wide. These wheels are compatible with all Tamiya gearbox kits.
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US$14.36
Allowing for a large degree of adjustability and creativity in design, the Track and Wheel Set offers three different lengths of tracks to choose from. Sprocket wheels, idler wheels, and road wheels have all been included.
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