Pneumatic wheels are wide and elastic and suitable for outdoor use on gravel and grass. It also fits into lighter trolleys indoors that needs to cross over for example thresholds. Pneumatic wheels have a attenuating feature that gives the wheel unique benefits as it rolls over obstacles like a threshold or a rock. A wheel with an elastic tread would bounce over an obstacle while a pneumatic wheel floates over it, for example, leaving the load in the wheelbarrow instead of on the lawn and on the wall of the house.
Plastic hub. Fork-mounted
Pressed steel. Fork-mounted