SIZE: 24" (507mm ISO bead diameter) - uses 1.75"-2.125 wide tires. HUB SPACING: 100mm FRONT / 110mm REAR.DRIVETRAIN: SINGLE SPEED, 16T or larger freewheel. Axle size: 3/8 front and rear. NOTE: Skyway mag wheels do not have a lip for the tire bead to "pull" against. Therefore, installing tires on these wheels is a challenge. You must first mount the tire/tube on the wheel and add just enough air to give the tire form. Then position/center the tire on the wheel, inflate a bit more, adjust the tire, etc. Until the tire is positioned evenly on the wheel before fully inflating the tire. IMPORTANT: There is no substitute for MEASURING your bike before ordering. While there are some rule of thumb standard for bikes from a specific era, there are no absolutes. We have over 3000 old school and retro BMX products (as well as hard to find stuff for other types of bikes) on our website. If you don't see what you're looking for here, there's a good chance we have it there. For instance, if you need tubes, we sell them on our website. This item is in the category "Sporting Goods\Cycling\Bicycle Tires, Tubes & Wheels\Wheels & Wheelsets". The seller is "porkchopzz4" and is located in this country: US. This item can be shipped to United States.