This is an Inflatable Treaded Wheel.

Features

Deep Tread Inflatable Wheel
Sold Grey Plastic Hub with Molded Spokes

Includes

One Wheel
One Air Valve

Requires

Pump

Specifications

Diameter: 95mm (3.75")
Hub Diameter: 4.8mm (3/16")
Width: 31.8mm (1.25")

Comments

For Spare Valve use DUBQ0809