A good quality wheel is extremely important for freestyle scooters. Each manufacturer has their own urethane compound so it's important that you choose a brand with a good reputation. Wheels range in size from 100mm, 105mm, and 110mm. The stock Razor Ultra Pro fork will only allow you to use 100mm and 105mm wheels, so you must have an aftermarket fork to run 110mm wheels. All of our wheels are priced and sold as a single wheel unless otherwise noted.