This wheel is now only available in pairs.
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 available in two colors: metallic red or chrome.
An included adapter lets you easily mount the wheel to motors with a 4mm output shaft, such as the 25D mm metal gearmotors found on the Dagu Wild Thumper chassis or the Pololu 20D mm metal gearmotor. The two adapter screws require a 3mm hex (or Allen) wrench. This wrench is not included, but can be found in most standard metric hex wrench sets.