The Freewheel is a 12" pneumatic castor wheel that clamps to the foot plate of most rigid frame wheelchairs. Once in place it lifts the small castor wheels of the wheelchair off the ground tipping the chair back slightly. It is made of aluminium so is fairly light.
When set-up for the wheelchair it's easy to put on and remove. It also comes with a bracket that fits to the cross bar at the back of the seat so that the Freewheel can be stored on the wheelchair when not in use. The FreeWheel is designed to make pushing over surfaces that would typically be very difficult like grass, gravel, uneven ground or snow.