Du-Bro Micro Sport Wheels 3" (76.2mm) Part No: 300MS. These open spoke wheels will add a sporty look to your model. They have been designed with electric models in mind. These also have many more applications in school projects and various crafts. Wheel Dia. = 3.00" (79.4mm) / Axle Dia. = .078" (2.0mm) / Weight = 11 grams/ea