Overview

These plastic wheels with silicone tires are 7 mm (0.28″) wide and 40 mm (1.57″) in diameter, and they are designed to press-fit securely onto 3mm-diameter D shafts, such as those on our micro metal gearmotors and our 120:1 mini plastic gearmotor.

Pololu 40×7mm wheel on a Micro Metal Gearmotor.

Pololu 40×7mm wheels.

The included silicone tires are also available separately.

Details for item #1452

Parts included with Pololu Wheel 40×7mm Pair – Black.

This is the black version of our 40×7mm wheel pair. These same-sized wheels are also available in red or white.

Other wheel options

We have similar wheels available in different sizes and colors:

Alternatives available with variations in these parameter(s): size color Select variant…

Black Pololu Wheels with 90, 80, 70, 60, 40, and 32 mm diameters (other colors available).

Pololu Wheels with 90, 80, 70, and 60 mm diameters in three colors: blue, red, and yellow.

These wheels are compatible with our Universal Mounting Hubs, which are available for different shaft sizes and mounting hole thread options, as shown in the table below. These mounting hubs can be used as adapters between these wheels and a variety of different motor shafts.

		Pololu Universal Mounting Hubs
		for 3mm shafts	for 4mm shafts	for 5mm shafts	for 6mm shafts	for 1/4″ shafts	for 8mm shafts
		M3 holes #4-40 holes #2-56 holes	M3 holes #4-40 holes	M3 holes #4-40 holes	M3 holes #4-40 holes	M3 holes #4-40 holes	M3 holes
Pololu Wheels for 3mm Shafts	32×7mm	–	–	–	–	–	–
	40×7mm	–	–	–	–	–	–
	60×8mm				–	–	–
	70×8mm				–	–	–
	80×10mm
	90×10mm
Pololu Wheels for Servos	40×7mm	–	–	–	–	–	–
	60×8mm
	70×10mm	–	–	–
	90×10mm	–	–	–
Pololu Multi-Hub Wheels	80×10mm	–	–	–

White Pololu Wheel 60×8mm on a Pololu 20D mm Metal Gearmotor.

Black Pololu Wheel 90×10mm on a Pololu 37D mm Metal Gearmotor.