Faster Speeds and More Control! These replacement wheels will have your scooter riding like its brand new again! They are high-performance, high-rebound scooter wheels which fit on most scooters and measure 100mm in diameter (standard 24mm width). The wheels have a rounded profile and Super High Rebound Urethane which lets the wheels to create less friction allowing for faster speeds and higher control. Smooth and Comfortable Ride! The Wheels utilize a specialized outdoor urethane formula, that creates longevity and more durability. Having a Durometer of 88A provides the rider with a smooth and comfortable ride. Replacement Scooter Wheels Upgrading to new wheels will make your scooter ride faster and smoother! Old wheels can make for a bumpy and rough ride. Old & Worn Wheels Old and worn out scooter wheels are dangerous and can cause injury. Its important to stay safe and to replace your scooter wheels when they are worn out.