Wheels, Tracks, and Ball Casters

Pololu Wheels

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Our selection of plastic wheels press fit onto the 3mm D shafts of our mini and micro metal gearmotors to make a nice drive solution for small robots.

Tamiya Wheels

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Tamiya is a Japanese company that manufactures a variety of high-quality hobby and educational products. We carry many of their educational construction kits, including gearboxes and the wheels that work with the gearboxes.

Solarbotics Wheels

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Solarbotics is a Canadian company that provides a variety of compact, affordable geared motors that are great for building small robots. We currently carry a wide selection of their GM-series gearmotors as well as compatible wheels.

Futaba Servo Wheels

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Wheels and sprockets that mount on Futaba servo splines.

Pololu Ball Casters

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Our ball casters are great third contact points for small differential-drive robots. These units have larger ball diameter-to-weight ratios than industrial units, giving your robot the ability to drive over larger obstacles without adding too much weight. Several sizes and ball options are available.


Dagu Wild Thumper Wheel 120x60mm and 4mm Shaft Adapter - Metallic Red
Pololu item #: 1558
Price: $11.95
Quantity:

Dagu Wild Thumper Wheel 120x60mm and 4mm Shaft Adapter - Metallic Red

This large (120mm-diameter) wheel from Dagu Electronics matches those on the Dagu Wild Thumper chassis and can be used as a replacement part or for custom robots that need to traverse complex, rugged terrain. The black tire is made of soft, spiked rubber for increased traction, and the plastic hub is metallic red in color. The included adapter lets you easily mount the wheel to motors with a 4mm output shaft. This is a single wheel, not a pair.

Dagu Wild Thumper Wheel 120x60mm and 4mm Shaft Adapter - Chrome
Pololu item #: 1559
Price: $11.95
Quantity:

Dagu Wild Thumper Wheel 120x60mm and 4mm Shaft Adapter - Chrome

This large (120mm-diameter) wheel from Dagu Electronics matches those on the Dagu Wild Thumper chassis and can be used as a replacement part or for custom robots that need to traverse complex, rugged terrain. The tire is made of soft, black rubber for increased traction, and the plastic hub is chrome (silver) in color. The included adapter lets you easily mount the wheel to motors with a 4mm output shaft. This is a single wheel, not a pair.

Pololu Universal Aluminum Mounting Hub for 3mm Shaft Pair
Pololu item #: 1079
Price: $5.95
Quantity:

Pololu Universal Aluminum Mounting Hub for 3mm Shaft Pair

The Pololu universal aluminum mounting hub allows you to mount custom wheels and mechanisms to 3 mm motor shafts. The hubs are sold in pairs, and each hub includes one 4-40 set screw for securing a motor shaft to the hub. These set screws require a 0.05" hex wrench (not included).

Pololu Universal Aluminum Mounting Hub for 4mm Shaft Pair
Pololu item #: 1081
Price: $6.95
Quantity:

Pololu Universal Aluminum Mounting Hub for 4mm Shaft Pair

The Pololu universal aluminum mounting hub allows you to mount custom wheels and mechanisms to 4 mm motor shafts. The hubs are sold in pairs, and each hub includes one 4-40 set screw for securing a motor shaft to the hub.

Pololu Universal Aluminum Mounting Hub for 5mm Shaft Pair
Pololu item #: 1203
Price: $7.49
Quantity:

Pololu Universal Aluminum Mounting Hub for 5mm Shaft Pair

The Pololu universal aluminum mounting hub allows you to mount custom wheels and mechanisms to 5 mm motor shafts. The hubs are sold in pairs. The set includes one Allen wrench and two 4-40 set screws for securing the hubs to motor shafts.

Pololu Universal Aluminum Mounting Hub for 6mm Shaft Pair
Pololu item #: 1083
Price: $7.95
Quantity:

Pololu Universal Aluminum Mounting Hub for 6mm Shaft Pair

The Pololu universal aluminum mounting hub allows you to mount custom wheels and mechanisms to 6 mm motor shafts. The hubs are sold in pairs, and each hub includes two 4-40 set screws for securing a motor shaft to the hub. These set screws require a 0.05" hex wrench (not included).

Tamiya 70140 Pulley (S) Set
Pololu item #: 109
Price: $6.25
Quantity:

Tamiya 70140 Pulley (S) Set

The Tamiya 70140 small pulley set contains eight pulleys of different diameters for use with other Tamiya products. The included assortment of bushings allow the pulleys to be mounted on various shaft types with the pulley either idling on the shaft or rotating with it.

Tamiya 70141 Pulley (L) Set
Pololu item #: 111
Price: $6.25
Quantity:

Tamiya 70141 Pulley (L) Set

Tamiya 70141 large pulley set contains six pulleys of different diameters for use with other Tamiya products. The included assortment of bushings allow the pulleys to be mounted on various shaft types with the pulley either idling on the shaft or rotating with it.

Tamiya 70121 Pulley Unit Set
Pololu item #: 108
Price: $11.00
Quantity:

Tamiya 70121 Pulley Unit Set

The Tamiya 70121 Pulley Unit Set includes seven pulleys of various sizes, a motor, and mounting parts. This set can be combined with a variety of Tamiya products.

Tamiya 70142 Ladder-Chain & Sprocket Set
Pololu item #: 107
Price: $14.00
Quantity:

Tamiya 70142 Ladder-Chain & Sprocket Set

The Tamiya 70142 Ladder-Chain & Sprocket Set includes 96 cm of chain and four sprocket wheels compatible with Tamiya gearboxes.

Tamiya 70144 Ball Caster Kit (2 casters)
On sale!
Pololu item #: 66
Price: $5.99 $6.25
Quantity:

Tamiya 70144 Ball Caster Kit (2 casters)

Tamiya’s steel-ball caster is a good way to give a “third wheel” to a small robot powered by a differential drive. The kit comes with enough parts to make two casters, either 25 mm or 35 mm in height.

Plastic Ball Caster Trio
Pololu item #: 174
Price: $1.95
Quantity:

Plastic Ball Caster Trio

This plastic roller ball is a great third contact point for a small, differential-drive robot. They are sold in threes.

Miniature Track Link and Pin
Pololu item #: 415
Price: $0.62
Quantity:

Miniature Track Link and Pin

If you’ve been looking to move from wheels to tracks but have been disappointed with rubber bands and timing belts, these tank tracks are for you. We sell this product in packs of ten loose links and pins.

Injection-Molded Sprocket Set 8T Hex
Pololu item #: 224
Price: $9.95
Quantity:

Injection-Molded Sprocket Set 8T Hex

This four-pack of 8-tooth injection-molded sprockets comes with two idler sprockets (with 1/4" holes) and two sprockets with 3-mm hexagonal holes (for use with Tamiya Gearboxes that have 3-mm hex shafts). The track links and pins are sold separately.

Injection-Molded Sprocket Set 8T GM
Pololu item #: 359
Price: $9.95
Quantity:

Injection-Molded Sprocket Set 8T GM

This four-pack of 8-tooth injection-molded sprockets comes with two idler sprockets (with 1/4" holes) and two sprockets with 7-mm holes for use with for use with Solarbotics GM2, GM3, GM8, and GM9 gearboxes. The track links and pins are sold separately.

Injection-Molded Sprocket Set 8T Futaba
Pololu item #: 358
Price: $9.95
Quantity:

Injection-Molded Sprocket Set 8T Futaba

This four-pack of 8-tooth injection-molded sprockets comes with two idler sprockets (with 1/4" holes) and two sprockets designed for use with Futaba servo splines. The track links and pins are sold separately.