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 micro gearmotors. Teeth on the hub optionally allow a reflectance sensor to be used for encoder feedback.
This product fits these Micro Gear Motors
Wheel diameter: 42MM
Wheel width: 18.7MM
Tire material: Rubber
Color: black