Sorry, but you can’t. The tires and wheels that your scooter comes equipped with are not changeable.
Most transportable scooters have solid tires made from a long-lasting plastic material called TPU. We tell folks that this type of tire (and the scooter it comes on) are best for smooth, made-made surfaces including tile, carpet, asphalt, pea-sized or smaller gravel and smooth, unbroken concrete.
For other surfaces, your riding experience can range from unpleasant to downright unsafe.
Larger scooters may have air-filled (pneumatic) tires that are suitable for a wider range of surfaces.