127mm (5") x 38mm Lightweight Treaded Polyurethane Wheel for 5mm Axle from Du-Bro - DUB500TL
This large scale treaded lightweight wheel is substantially lighter than other aircraft wheels available.  This lightweight wheel features a foam interior with a tough and rugged exterior skin for durability.  Excellent for paved runways!  The hub has a 3\/16 (5mm) axle dia. opening and can be drilled out to 1\/4.
One wheel is included. Must order two if you need a set. 
Features:

lightweight
foam interior
tough and rugged exterior skin
Quantity ONE per package