Manufactured from light weight styrene ready to paint, specifically designed for rubber powered aircraft. Wheel halves are in pairs, designed with a recessed edge that slips one half inside the other to create a strong overlapping joint. Glue using Jet INSTANT or balsa cement. Make your own hole for the axle to fit whatever diameter music wire you need. Finished weight = 1.8 grams/wheel on average. Watch the full how-to video 4 halves/pair.
