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12mm Hex Hub (pair)
Price: $10.00
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Availability: Available
Machine Lab Item #: hexhub -

12mm hex hubs for the ML-30 / ML-50 motors.There is a 6 mm hole in one side with set screw for the ML-30 or ML-50 motor shaft and an 8-32 tapped hole in the other side to retain the wheel. Wheels and tires sold separately. Sold in pairs. ML-hexhub

Ball Caster with 1/2in. Metal Ball
Price: $3.99
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Availability: In Stock
Pololu Item #: 953 -

This ball caster kit includes a black ABS housing, a 1/2in. diameter metal ball, two spacers (1/16in. and 1/8in. thick), and two #2 screw sets.The total height of this ball caster is 0.53in. 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 0.58in.0-PL953

Ball Caster with 1/2in. Plastic Ball
Retail: $2.99
Price: $1.99
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Availability: In Stock
Pololu Item #: 952 -

This ball caster kit includes a black ABS housing, a 1/2in. diameter plastic ball, two spacers (1/16in. and 1/8in. thick), and two #2 screw sets.The total height of this ball caster is 0.53in. 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 0.58in.0-PL952

Ball Caster with 1in. Plastic Ball
Price: $6.99
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Availability: In Stock
Pololu Item #: 956 -

This ball caster kit includes a black ABS housing, a 1in. diameter plastic ball, three dowel pin rollers, two spacers (1/16in. and 1/8in. thick), and two #2 screw sets.The total height of this ball caster is 1.1in. with no spacers. You can also adjust the height to 1.3in. 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 0.69in.0-PL956

Ball Caster with 3/4in. Metal Ball
Price: $4.99
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Availability: In Stock
Pololu Item #: 955 -

This ball caster kit includes a black ABS housing, a 3/4in. diameter metal ball, two spacers (1/16in. and 1/8in. thick), and two #2 screw sets.The total height of this ball caster is 0.83in. with no spacers. You can also adjust the height to 1.0in. 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 0.61in.0-PL955

Ball Caster with 3/4in. Plastic Ball
Price: $5.99
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Availability: In Stock
Pololu Item #: 954 -

This ball caster kit includes a black ABS housing, a 3/4in. diameter plastic ball, three dowel pin rollers, two spacers (1/16in. and 1/8in. thick), and two #2 screw sets.The total height of this ball caster is 0.91in. with no spacers. You can also adjust the height to 1.1in. 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 0.24in.0-PL954

Ball Caster with 3/8in. Metal Ball
Price: $2.99
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Availability: In Stock
Pololu Item #: 951 -

This ball caster kit includes a black ABS housing, a 3/8in. diameter metal ball, two spacers (1/16in. and 1/8in. thick), and two #2 screw sets.The total height of this ball caster is 0.4in. with no spacers. You can also adjust the height to 0.6in. 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 0.53in.0-PL951

Ball Caster with 3/8in. Plastic Ball
Price: $2.99
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Availability: In Stock
Pololu Item #: 950 -

This ball caster kit includes a black ABS housing, a 3/8in. diameter plastic ball, two spacers (1/16in. and 1/8in. thick), and two #2 screw sets.The total height of this ball caster is 0.4in. with no spacers. You can also adjust the height to 0.6in. 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 0.53in.0-PL950

Pololu  Wheel 40 x 7mm Pair White
Price: $5.49
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Availability: In Stock
Pololu Item #: 1454 -

These white plastic wheels have silicone tires measuring 40 mm (1.57″) in diameter and press-fit onto the 3mm D output shafts on many of our motors with 3mm shafts.SpecificationsDiameter: 1.57″ (40 mm)Width of tire: 0.26″ (6.5 mm)Weight: 0.15 oz (4.3 g)Shaft type: 3mm ''D''0-1454

Pololu Wheel 42 x 19mm - Set of Two
Price: $6.98
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Availability: Back Order
Pololu Item #: 1090 -

These custom-designed plastic wheels have rubber tires measuring 1.65" (42 mm) in diameter and are designed to fit the output shafts on our micro and mini metal gearmotors. Our extended micro metal gearmotor bracket is specifically designed to work with these wheels. Please note that the non-extended version of our mountingbracket will not work well with these wheels.SpecsDiameter: 1.65in (42mm)Width of Tire: 0.75in (19mm)Weight: 0.55oz (16g)Motor not included.0-PL1090 ...

Pololu Wheel 70 x 8mm Pair - Black
Price: $7.95
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Availability: In Stock
Pololu Item #: 1425 -

These black 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. The wheels have silicone tires and measure 70 mm (2.75") in diameter. Two additional mounting holes make it possible to use the wheel with several of our universal mounting hubs. The wheels are sold in pairs.Both our micro metal gearmotor bracket and extended micro metal gearmotor bracket work with this wheel.SpecificationsDiameter: 2.75" (70...

Replacement 3pi Ball Caster with 1/2in. Plastic Ball
Retail: $2.99
Price: $1.69
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Availability: In Stock
Pololu Item #: 957 -

This ball caster can be used as a replacement 3pi robot part or as a general-purpose ball caster. When mounted through a hole in a chassis that uses micro metal gearmotors and 32x7mm wheels, as on the 3pi, this ball caster is just the right height to keep the chassis level. The hole for this ball caster in the 3pi chassis has a diameter of 600 mils (0.6") and has a side that is flattened by 30 mils.Replacing the 3pi Ball CasterTo replace the ball caster on your 3pi, you will need to unscrew...

RW2 Large Rubber Wheel with Aluminum Hub
Price: $5.99
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Availability: Temporarily Unavailable
Solarbotics Item #: RW2-3mm -

These beautifully machined aluminum hubs come with a generously thick rubber tire for maximum traction.The tire mounted on the hub measures in at 31.2mm (1.23in) diameter and overall width (including set-screw flange) of 17mm (0.67in) wide. The hub is drilled for a 3mm axle, but the pilot hole is 1/16", so it's easy for you to drill it out to exactly whatever size you require! It's a nice, fat, beefy wheel ideal for small robots. Secure it to your motor shaft with the included 4-40 hex...

Servo Tire and Wheel - 2.63 x 0.35in. (pair)
Retail: $8.99
Price: $6.69
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Availability: Discontinued
Lynxmotion Item #: SRVT-01 -

Need servo wheels to fit your servos for a small robot or science project? These press fit directly onto Hitec servo splines.Diameter - 2.63"Width - 0.35"Motors - Any Hitec standard servo spline0-SRVT-01

Surveyor Wheels - Set of Four
Price: $24.00
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Availability: Discontinued
Item #: SRVWHL -

These custom turned aluminum wheels made for our small robot chassis like Surveyor (or any 3mm shaft). They are great for the Sanyo NA style motors used on Surveyor as well as 3mm shaft Copal and FingerTech motors . The wheels come complete with a super grippy all terrain rubber tread, and a stainless set screw for fixing it to the shaft (accessed under the tread with a 1/16" hex wrench). While these will work with round shafts, they get the best purchase on a shaft with some sort of a flat on...

VEX Robotics 2.75 in. Wheel, 4-Pack
Price: $9.99
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Availability: Temporarily Unavailable
VEX Item #: 276-1496 -

A set of four Low Friction Wheels, as seen in the VEX Robotics Design Starter Kit. These wheels include a smooth grippy tire which has high traction on smooth surfaces.2.75" diameter wheels. Compatible with VEX Square Shaft 0.125in. (3.2mm)VEX-LOWFRICTION

VEX Robotics 4in. All Purpose Wheel, 4-pack
Price: $19.99
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Availability: Temporarily Unavailable
VEX Item #: 276-1497 -

A set of four All-Purpose Wheels, as seen in the VEX Robotics Design Starter Kit.4" all-purpose wheels. Compatible with all VEX Square Shafts 0.125" (3.2mm).VEX-276-1497

VEX Robotics 4in. High Traction Tire, 4-pack
Price: $12.99
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Availability: Temporarily Unavailable
VEX Item #: 276-1489 -

The VEX 4" High Traction Tires are replacements for the "all-purpose" treads found on VEX 4" diameter wheels. These tires are designed to provide high traction on smooth surfaces. *Note: This kit includes tires only, wheel rims not included. Simply remove the current 4" tires from their plastic rims and replace them with these high traction ones. Specs Kit Contents (4) 4in. High Traction Tires *Note: Wheel rims not included. Size 4in. diameter Compatibility For use with 4in. VEX wheels...

VEX Robotics 5in. Knobby Wheel, 4-pack
Price: $19.99
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Availability: Temporarily Unavailable
VEX Item #: 276-1498 -

A set of four Knobby Wheels, as seen in the VEX Robotics Design Starter Kit.5" knobby wheels. Compatible with all VEX Square Shafts 0.125" (3.2mm).VEX-276-1498

VEX Robotics Wheel Kit
Price: $29.99
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Availability: Temporarily Unavailable
VEX Item #: 276-2164 -

The right tire for the terrain gives your robot the advantage. Includes three wheels in three different treads: low friction, all-purpose and rough terrain. Technical Info Tire Sizes 2.75, 4.0, and 5.0 inches Compatibility All VEX Square Shafts 0.125" (3.2mm) Weight Intake - 0.02 lbs. / Small Low-friction - 0.12 lbs. / All-purpse - 0.20 lbs. / Rough Terrain - 0.35 lbs. Center Hole Size 0.125 in. square List of Contents 2 Intake Rollers 4 2.75 in. Wheels 2 4.0 in. Wheels 2 5.0 in. Wheels...