Until now all there was for bearing redlines dual wheels was a medium cap axle. dual wheel look such as Ramblin' Wrecker, or can also be used on gassers to make a redline drag slick. Your imagination is all that limits you with these bearings. These are custom 3d printed and hole is drilled by hand with a pin vice to make the center hole straighter. I made these for my Ramblin' wreckers, and now available to you too. Each kit has 4 wheels and 2 axles, enough to do 2 cars or one with dual rear axles. Sold as a kit so you can adapt it to any hot wheels or matchbox car you please. Best place to get the deep dish or regular wheels to get these bearings is Bright Vision Wheels (they have the best prices and free shipping). will work with any large cap wheel designed for redline hot wheels.