This is a pair of 2.5" Diameter Micro Sport Wheels from Du-Bro. Designed for indoor and park flyer models White Nylon, Open 5-spoke design adds a sporty look to your model Pre-mounted smooth foam tires Two 2.5" Diameter Micro Sport Wheels Installation Diameter: 2.5" (63mm) Width: .40" (10mm) Axle Hole Diameter: .078" (2mm) Weight: 6.9 grams (each wheel) kpm11/28/2007 ir/jxs &