Pololu - 2356
These wheels fit 2 mm diameter output shafts such as the ones on our sub-micro plastic planetary gearmotors. The tire is not removable.
Due to small variances in the sub-micro plastic gearmotor’s output shaft, in some instances, the 14 mm wheel might fit loosely. If you experience a loose fit, you could try swapping wheels or using a small dab of glue to help hold the wheel on.
The wheel hub is made of ABS and the tires are natural rubber.
The following diagram shows the wheel’s dimensions in mm.