• KELVIN® Big Project Rear Wheel

    KELVIN® Big Project Rear Wheel

    For your Mousetrap dragster. 4-3/4 in. dia. wheel (same size as a CD disc) fits 1/4 in. dia. axle. Comes with a 1/8 in. insert. 10/pkg. Color may vary.

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  • KELVIN® CD to Wheel Adapter

    KELVIN® CD to Wheel Adapter

    Cleverly converts your unwanted CDs into a fun wheel. Designed to fit 1/4 in. dowel rod. Can be used with KELVIN® 1/4 in. to 1/8 in. Wheel Adapter (990317). 20/pkg.

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  • Servo Wheel

    Servo Wheel Set

    Pack of [2] 3 in. dia. wheels, [8] screws to attach to servo motor arm, and [2] rubber bands for traction. Fits standard servo motor (not included). Servo motor not included.

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  • TechCard Wheels & Axles Resource Pack

    TechCard Wheels & Axles Resource Pack

    Includes [90] 300 mm axles (5 mm dia.) and [60] each of 60 mm, 50 mm, and 40 mm cardboard wheels. TechCard and selected mechanical components are available in separate resource packs. These are especially useful for teachers taking a design and make...

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  • Robot Wheels Set

    Robot Wheels Set

    Includes: [2] wheels, [2] rubber bands and screws. Fits Servo Motor (851878) with screws.

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  • Hub Wheel

    Hub Wheel

    39 mm polythene wheel has a 3mm hole. For use as a center hub for the rubber tire (391138). Color varies.

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  • Plastic Wheel

    Plastic Wheel

    1-1/2 in. dia. plastic wheel fits a 3mm axle. Assorted colors. 60/pkg.

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  • Plastic Wheel with Holes

    Plastic Wheel with Holes

    1-9/16 in. dia. x 5/8 in. thick wheel. Make 3-wheeled vehicles! Use a wheel by itself in front and pushing the axle through. Fits 1/8 in. axle. Black, 100/pkg.

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  • Caterpillar Track

    Caterpillar Track

    A soft durable track with a transverse tread; ideal for micro-rovers, robots etc. Can be used with 39mm wheels (391144) or 75mm wheels (391143). The track is 30mm x 180mm long when used with the 39mm wheels.

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  • Tire w/Wheel

    Tire w/Wheel

    2.6 in. dia. Rectangular axle hole fits Gear Motor (390463) or Gearbox and Inline Motor (282396). 2/pkg.

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  • Wood Wheels, 2-3/4 in. dia.

    Wood Wheels, 2-3/4 in. dia.

    These wheels looks and feel like a SUMO Car Wrestler® wheel should! Wheels are 2-3/4 in. diameter, 1-1/2 in. thick with a center hole that is 11/64 in. in diameter. Does not include rubber tread traction material.

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