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Ball Caster Metal - 3/8"
Price: $4.26
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Sparkfun Item #: ROB-08909 -

"This ball caster kit from Pololu includes a black ABS housing, a 3/8" diameter metal ball, two spacers (1/16" and 1/8" thick), and two #2 screw sets. The total height of this ball caster is 0.4" with no spacers. You can also adjust the height by adding the spacers. The ball caster can be mounted to a chassis by the two screw sets included in the kit. The distance between the two screw holes is 0.53"."

Ball Caster Omni-Directional Metal
Price: $7.66
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Sparkfun Item #: ROB-00320 -

"A metal caster used for omni-directional robots. Omni-what? Imagine a robot with the dual-motor gear box. The robot can pivot in one spot, but it must also allow the other wheels on the drive train to move or slide during a turn. This caster allows the robot to rotate and pivot in all directions - omni-directional - without the need for complex steering mechanisms. Features: Can be configured for 6 different overall heights including 11, 16, 25, 27, 35, and 37mm Includes mounting holes and...

Ball Caster Plastic - 3/8"
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Price: $4.26
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Sparkfun Item #: ROB-08908 -

"This ball caster kit from Pololu includes a black ABS housing, a 3/8" diameter plastic ball, two spacers (1/16" and 1/8" thick), and two #2 screw sets. The total height of this ball caster is 0.4" with no spacers. You can also adjust the height by adding the spacers. The ball caster can be mounted to a chassis by the two screw sets included in the kit. The distance between the two screw holes is 0.53""

D65mm Rubber Wheel Pair - Red (Without Shaft)
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Price: $11.98
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DFRobot Item #: FIT0199-R -

These are typical rubber wheels for small robot mobile platforms. The tire is soft black rubber with light tread for added traction in rugged terrain. An axis adapter is needed which bolts to the back of the hub and mounts to a motor. this adapter(FIT0198) can mount to our Micro DC Geared Motor with Back Shaft(FIT0016). These motors are commonly used in our 4WD and 2WD platforms like Turtle (2WD Arduino Mobile Robot Platform), Pirate (4WD Mobile Platform), Baron(Arduino Mobile Robot Platform...

D80mm Silicone Wheel For TT Motor
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Price: $2.59
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DFRobot Item #: FIT0500 -

This is a DFRobot designed silicone wheel comes with high quality ABS material wheel hub and silicone wheel tire. To build your own robot, a proper wheel is always the first thing to look at. A nice looking and soft tire will great make your robot project shine and stunning. This wheel is compatible with our TT Geared DC motors or TT Geared DC Motors with Encoders|Specification|Outside Diameter: 80 mmTire Width: 17 mmShaft hole Size: 5.4 mm in diameter, 3.1 mm thicknessWeight: 40...

Heavy Duty Wheel - 6"
Price: $13.60
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Sparkfun Item #: ROB-12437 -

"These heavy duty wheels have a diameter of 6” and a width of 1”. They have a hard inner plastic core and a smooth outer rubber tire. These wheels utilize the 1.5” hub pattern and are ideal for any larger robot you create. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively connected together. The wide...

N20 ABS Rubber Wheel 43x9mm (Pair)
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Price: $9.98
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DFRobot Item #: FIT0494 -

This custom-designed rubber wheel has a rubber tire with a diameter of 1.69" (43 mm). It is designed to fit the output shafts on our mini metal gear motors as well as the Solarbotics metal gear motors. Teeth on the hub optionally allow a reflectance sensor to be used for encoder feedback.Gear motors should be mounted onto the side of the hub with the protruding teeth. The output shaft will slide into the socket easily at first but will achieve a snug fit when pressed through to the other edge...

Precision Disc Wheel - 3" (Clear Orange, 2 Pack)
Price: $6.79
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Sparkfun Item #: ROB-12398 -

"These clear orange precision disk wheels have an outer diameter of 3”, a width of 0.23”, and utilize the 0.77” hub pattern. These simple wheels are ideal for any light robot that needs a basic disc for simple movement, and use a removable rubber ring for traction. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be...

Precision Disc Wheel - 3" (Red, 2 Pack)
Price: $6.79
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Sparkfun Item #: ROB-12382 -

"These red precision disk wheels have an outer diameter of 3”, a width of 0.23”, and utilize the 0.77” hub pattern. These simple wheels are ideal for any light robot that needs a basic disc for simple movement, and use a  removable rubber ring for traction. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be...

Precision Disc Wheel - 4" (Orange, 2 Pack)
Price: $8.15
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Sparkfun Item #: ROB-12210 -

"These orange precision disk wheels have an outer diameter of 4”, a width of 0.23”, and utilize the 0.77” hub pattern. These simple wheels are ideal for any light robot that needs a basic disc for simple movement, and use a removable rubber ring for traction. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be...

Precision Disc Wheel - 4" (Red, 2 Pack)
Price: $8.15
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Sparkfun Item #: ROB-12241 -

"These red precision disk wheels have an outer diameter of 4”, a width of 0.23”, and utilize the 0.77” hub pattern. These simple wheels are ideal for any light robot that needs a basic disc for simple movement, and use a removable rubber ring for traction. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively...

Precision Disc Wheel - 6" (Black)
Price: $7.47
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Sparkfun Item #: ROB-12385 -

"These black precision disk wheels have an outer diameter of 6”, a width of 0.23”, and utilize the 0.77” hub pattern. These simple wheels are ideal for any light robot that needs a basic disc for simple movement, and use a removable rubber ring for traction. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be...

Rubber Ring - 4.65"ID x 1/8"W
Price: $1.48
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Sparkfun Item #: ROB-12233 -

"These lipped Rubber Rings have an inner diameter of 4.65", a width of 1/8", and a sturdy rubber sidewall. These rings can be used as a replacement for Precision Disk Wheels or can wrap around the outside edge of another flat disc to make the ring a simple tire. Dimensions: ID - 4.65" Width - 1/8" "

Rubber Wheel (Compatible with Servo &; Motor)
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Price: $8.10
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DFRobot Item #: FIT0336 -

This rubber wheel is used in our popular 4WD mobile platforms. It can be mounted directly onto micro gear motors, but also compatible with our most servos.|Specification| Outer Diameter: 80mm(3.15") Wheel Width:30 mm(1.18") Axle Pore Size: 5.8mm(diameter)×3.5mm?thickness? (0.23"x0.14") Axle depth:7.6mm(0.30")|ShippingList| Rubber Wheel(Compatible with Servo&Motor) x2 ...

Skate Wheel - 2.975 (Blue)
Price: $3.52
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Sparkfun Item #: ROB-12426 -

"These blue “skate” wheels have an outer diameter of 2.975”, an inner diameter of 0.87”, and a width of 0.94”. When used in conjunction with the skate wheel adapters (check below), you can use them with Actobotics motors and shafts, or use them with standard skate bearings. Dimensions: OD - 2.975” ID - 0.87” Width - 0.94” Documents: SketchUp Part Product Page (595618) " ...

Skate Wheel - 2.975 (Gray)
Price: $3.52
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Sparkfun Item #: ROB-12139 -

"These gray “skate” wheels have an outer diameter of 2.975”, an inner diameter of 0.87”, and a width of 0.94”. When used in conjunction with the skate wheel adapters (check below), you can use them with Actobotics motors and shafts, or use them with standard skate bearings. Dimensions: OD - 2.975” ID - 0.87” Width - 0.94” Documents: SketchUp Part Product Page (595616) " ...

Skate Wheel - 2.975 (Orange)
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Price: $3.52
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Sparkfun Item #: ROB-12218 -

"These orange “skate” wheels have an outer diameter of 2.975”, an inner diameter of 0.87”, and a width of 0.94”. When used in conjunction with the skate wheel adapters (check below), you can use them with Actobotics motors and shafts, or use them with standard skate bearings. Dimensions: OD - 2.975” ID - 0.87” Width - 0.94” Documents: SketchUp Part Product Page (595620) " ...

Skate Wheel - 4.90 (Orange)
Price: $6.79
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Sparkfun Item #: ROB-12280 -

"These orange “skate” wheels have an outer diameter of 4.90”, an inner diameter of 0.87”, and a width of 0.94”. When used in conjunction with the skate wheel adapters (check below), you can use them with Actobotics motors and shafts, or use them with standard skate bearings. Dimensions: OD - 4.90” ID - 0.87” Width - 0.94” Documents: SketchUp Part Product Page (595626) " ...

Skate Wheel Adapter - Hub Connection
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Price: $8.15
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Sparkfun Item #: ROB-12534 -

"These skate wheel adapters have a diameter of 1”, a width of 0.32”, and utilize the 0.77” hub pattern. These adapters allow you to attach the 2.975” or 4.90” skate wheels to almost any gear, pulley, or sprocket by connecting to any part utilizing the 0.77” hub pattern. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all...

Skate Wheel Adapter - Shaft Connection
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Price: $8.15
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Sparkfun Item #: ROB-12329 -

"These skate wheel adaptors have a diameter of 1”, a width of 0.32”, and utilize the 0.77” hub pattern. These adaptors allow you to attach the 2.975” or 4.90” skate wheels to ¼” drive shafts. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively connected together. The wide range of...

Tank Treads
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Price: $12.77
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Sparkfun Item #: ROB-00321 -

"Track set for tank treads. Use these treads to create your own tank setup. These work superbly with the Tamiya dual gear box. Comes with: 2 Tracks x 30 Links 2 Tracks x 10 Links 2 Tracks x 8 Links 2 Large Drive Sprockets 2 Large Idler Wheels 6 Large Road Wheels 10 Small Road Wheels Various Drive and Slip Shafts Various Screws and Hardware "

Wheel 32x7mm
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Price: $9.36
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Sparkfun Item #: ROB-08901 -

"This custom-designed plastic wheel from Pololu has a silicone tire measuring 1.26" (32 mm) in diameter and is designed to fit the output shafts on our micro and mini metal gearmotors as well as the Solarbotics metal gear motors. Both the Micro Metal Gearmotor Bracket and Extended Micro Metal Gearmotor Bracket will work with this wheel. Sold as two wheels."

Wheel 42x19mm
Price: $8.51
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Sparkfun Item #: ROB-08899 -

"This custom-designed plastic wheel from Pololu has a rubber tire measuring 1.65" (42 mm) in diameter and is designed to fit the output shafts on our micro and mini metal gearmotors as well as the Solarbotics metal gear motors. Teeth on the hub optionally allow a reflectance sensor to be used for encoder feedback. This rugged wheel is designed to fit securely on the output shafts of the micro and mini metal geramotors. These gearmotors should be mounted onto the side of the hub with the...

Wheel 42x19mm (Pair)
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Price: $5.00
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DFRobot Item #: FIT0085 -

This custom-designed plastic wheel has a rubber tire measuring 1.65" (42 mm) in diameter and is designed to fit the output shafts on our mini metal gearmotors as well as the Solarbotics metal gear motors. Teeth on the hub optionally allow a reflectance sensor to be used for encoder feedback. This rugged wheel is designed to fit securely on the output shafts of the micro metal geramotors. These gearmotors should be mounted onto the side of the hub with the protruding teeth. The output shaft...