Du-Bro Micro Sport Wheels 1.45" (37mm) Part No: 145MS. 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. = 1.450" (37mm), Axle Dia. = .078" (2.0mm), Weight = 1.8 grams/ea.