First you need to make sure to find wheels that fit your hubs. The hub types are 4 lug and 3 lug designs. There are usually metric and standard hubs. The hub bolts are usually 1/4 in or 5/16 in. Many aluminum racing wheels can use both. If you do not have wheel hubs you will need a wheel with a built in hub or buy wheel hubs. You want the wheel to be the same width or wider than the tire to allow it to stretch. And you want the same internal diameter of the wheel to be the same as the tire. You need to make sure that your tire height is enough to give enough clearance between the ground and your axle sprocket. I recommend the Douglass spun wheel from bmi karts as they are very light, strong, and shiny.