TTW-4000-S 4" Aluminum Wheel Set (2pc. SET) Approximate Weight: 2.31 oz 4" Wheels! A beautiful addition to your project. Tru-Turn Wheels are, by design, Lightweight and Precision components which will give you years of good service. * Our Wheels are being introduced in 7 different sizes with many configurations and shapes to come. All Tru-Turn Wheels come pre-mounted with an O-ring tire. Our Wheels come pre-drilled with a standard center hole. You drill the center hole to your axle size. Wheels mount on your landing gear with your standard hardware. Three piece sets for specific aircraft available upon request. Price $ 29.95