Our new Mounted Dirt Oval Foams. Mounted and trued dirt oval foams on our new RC4LESS Wheels. We took our time and think we have a tire that will satisfy our customers. These tires are sized to fit Sprint Cars and EDM & dirt oval cars that use a rear 3/16 axle with roll pin. Also these tires work great on 4 wheel drive latemodel cars built from touring cars like TC3 & TC4. Just remove the hex mounts from your touring car and mount 4 rears all around and your set! Finished dimensions Rears 1.40 inches wide & 2.90 inches diameter. 6 Compounds to choose from: Silver, Gold & Bronze are our medium rubber content foams and Pink, Magenta & Purple are our high rubber content foams. Silver our softest tire with a durometer reading of 25. Great for stickey soft clay tracks. Gold compound is just slightly harder than silver at 30. Bronze is the third compound in this family with a durometer reading of 35. Our high rubber content compounds are Pink with a durometer rating of 35, Magenta is slightly harder at 40 and our Purple is rated at 45+ and is perfect for high bite asphalt or very abrasive gritty clay.