Description Here is a set of two 6300ZZ (6300Z) shielded wheel bearings for mobility scooters and power chairs. These same bearings may also be found on many recreational scooters, ATVs, mini bikes, dirt bikes, and go karts. Please check the specifications tab for detailed dimensions on these 6300ZZ bearings. Chrome metal shields on both sides of the bearing shield the inner ball bearings from the elements. These 6300ZZ (6300Z) scooter bearings are made of chrome steel, are pre-lubricated, and ready to install. Always replace scooter wheel bearings in sets of two. Specifications Diameter (Outer): 35 mm Diameter (Inner): 10 mm Width: 11 mm Compatibility Drive Medical Daytona 3 GT (S35005GT/S35006GT)