These are a Pair of Top Flite Wire Wheels. A Great way to add Elegant Style to your Vintage Aircraft. FEATURES: Wheels come factory-built and ready to install, with no tedious spoke assembly. 4" (102mm) diameter wheels feature chrome-plated spokes and rim. Axle diameter of 5/32" Wheels are mounted on real rubber treaded tires with a medium-to-hard compound. INCLUDES: One pair of 4" (102mm) Diameter Wire Wheels. REQUIRES: Mounting to your landing gear. SPECS: Diameter: 4" (102mm) Width: .75" (19.20mm) at hub .55" (13.90mm) at tire Weight: 2.8oz (80 grams) per tire Axle Diameter: 5/32" kh06-13-02 ir/kh updt jxs 2/20/04 updt EEW 5/11/06