Du-Bro Micro Sport Wheel 1.86" \(47mm\) Part No: 186MS. 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. = 1.860" \(47mm\) / Axle Dia. = .078" \(2.0mm\) / Weight = 3.2 grams/ea