Studded wheels with bushing (to protect motor bearings) for ambrogio L15/20. The wheels are slightly larger than regular wheels, but because the spikes will dig into the ground, the effective circumference is roughly the same.
With these wheels you will usually have (much) better grip on grass and less visible flattening of the lawn, but you may need to put some rubber on the charging station to give it enough grip there.
The price is for a set of 2 wheels.
The product was designed by
P4man