114.3mm (4.5") x 33mm Lightweight Treaded Polyurethane Wheel for 5mm Axle from Du-Bro - DUB450TL
These Large Scale Treaded Lightweight wheels are substantially lighter than other aircraft wheels available.  These lightweight wheels feature a foam interior yet have a tough and rugged exterior skin for durability.  Excellent for paved runways!  Hubs come with 3\/16 (5mm) axle dia. opening and can be drilled out to 1\/4.
Features:

lightweight
foam interior
tough and rugged exterior skin