Rollerblade wheels are durable, absorb vibration and allow for good grip with a smooth ride. The Wheel kit comes with (8) 90mm wheels, (16) SG9 bearings and (8) 8mm spacers preassembled to make replacing wheels easy and convenient. Skate Type: Fitness, Best Use: Performance, Bearings Included: Yes, Number of Wheels: 8, Wheel Durometer: 84A, What Bearings are Included?: SG9, Model Year: 2020, Product ID: 592670, Model Number: 06951400 000, GTIN: 0888341637914