This is an Inflatable 4-1/2 Treaded Wheel.

Features

Deep Tread Inflatable Wheel
Sold Grey Plastic Hub with Molded Spokes

Includes

One Wheel
One Air Valve

Requires

Pump

Specifications

Diameter: 114.3mm (4.50")
Hub Diameter: 4.8mm (3/16")
Width: 38.1mm (1.50")

Comments

For Spare Valve use DUBQ0809