The Envy Hollow Core 120mm pro scooter wheel comes with a 26mm wide urethane that provides more grip in corners. 86A durometer urethane provides a softer feel and extra grip so it keeps you from sliding aorund at the skatepark. The wider urethane on this wheel makes it a little difficults to install on your fork; please be careful with installation. These Envy Hollow Core 120mm scooter wheels are sold as a pair and INCLUDE bearings equivalent to ABEC 9’s. Keep in mind that these wheels are bigger than your average wheel so they might not fit on any scooter. If you are unsure about what wheel size to purchase, feel free to contact and ask us!