Reliable Performance: 64 mm, 70 mm, 72 mm, 76 mm or 80 mm Diameter, 24 mm Width/Thickness. 8 mm ABEC-9 bearings, 8 mm floating spacers; Inline skates replacement wheels of WHEELCOME for roller blades are made of abrasion-resistant, high-density polyurethane, can be used outdoors in poor road conditions definitely

608RS Bearings ABEC-9 and Floating Spacers: The 8 mm I.D bearings and spacers that came with these Training Wheels maybe weren't the right set up for your inline skates, blades roller hockey skates, caster wave board, snake surfboard, roller luggage suitcase, office chair, or kick scooters, but they were easy to remove and replace by the original or purchased 6 mm I.D ones

85A Durometer: 85A Moderate hardness, well bounce, most durable one (long life use); Great grip; Strong hub for any jumps; Most popular choice of WHEELCOME wheels brand

Less Friction and Increased Speed: An all around wheel designed for the intermediate player looking for good speed, grip and wear on a variety of surfaces. Freeride, Fitness , Urban, Slalom, Recreational skating, YOU CAN TRUST IT

The Best Outdoor and Indoor Wheels: Eight complete replacement wheels PER SET; Five colors and Five sizes are available; Specially formulated for outdoor use, also perform well indoors or on the floor