Du-Bro Low Bounce Smooth Wheels are Perfect for Trainer, Sport, Scale or Pattern Aircraft Models. Low-Bounce, Non-Treaded Rubber Tires Nylon Hub for Longer Wear Two 1-3/4" Low Bounce Wheels Width: 11/16" (18mm) Weight per Wheel: 0.54 ounce (16 grams) Center Hole Diameter: 3/32" (3mm) Outside Diameter: 1-3/4" (45mm) Hubs fit 1/8" axles. NMH 3-5-92 upaxy5/23/98 updated JPG 3/29/02 ir/jl &