L.E.D. Scooter Wheels with ABEC 9 Bearings for Razor Scooters 100mm Light Up 2-Pack No batteries needed, these wheels are powered by centrifugal force. Each wheel includes 3 super bright LED lights that shine for over 10,000 hours Includes a pair of 2 100mm Wheels with Fast Abec 9 Bearings. These L.E.D Light up wheels are super easy to install and will fit on almost every scooter (make sure to check specs first, these are 100mm in diameter with a standard size 24mm width) The Rounded Profile and Super High Rebound Urethane creates less friction allowing for faster speeds and better control Abec 9 bearings offer the highest amount of precision, speed, and durability in scooter replacement bearings. Dont just look cool with light up wheels, Increase your speed with Abec 9 Bearings! These light up wheels not only look awesome, the wheels illuminate the rider at night adding an element of safety to night time riding. Be Safe, Be Seen!!