Includes 4 Wheels with Abec 7 Bearings Diameter: 100mm Durometer: 88a Bearings: Abec 7 Rubber Shield Servicable These high-performance high-rebound scooter wheels were formulated specifically for street scooters. The 5-Star hub is designed to maintain strength & integrity of the wheel for riders who attempt extreme moves. Replacement wheels fit all 100mm type mini-scooters with and without suspension. Each bearing had dual rubber shields to protect the bearing from dust and other contaminates. The Shields are removable for routine servicing. To save on supplies and overhead we only ship the wheels & bearings not the packaging.