8pcs Roller Skate Wheels Quad Skates Replacement Outdoor Quad Roller Skate Wheel With Skate Roller Size: the size of the roller skate wheel is hardness of 82A, 80% rebound, suitable for four-wheel skates and skateboards but not suitable for inline skates; Please the specifications before purchasing; Bearings and spacers are already installed on the wheels Reliable material: the roller skate wheels are made of durable and long-lasting pu with 82A hardness, which provide nice performance of sliding; The skate wheels perform well on interior surfaces of wood, concrete and sports tiles, giving you a lasting grip, great for small and the normal bumpiness of the outdoor surface Designed to reduce friction: these skateboard wheels perform well on surfaces; They are designed to increase and maximize speed; These roller skating wheels can be applied for casual indoor skating or competitive skating Application: these skateboard wheels are great to reduce friction, while providing better grip and control, especially safe for beginners to learn skating Colour:black Material:PU Size:58 x 39mm Package Contents: 8 x Skateboard wheel 20 x Bearing 10 x sleeve 1 x Wrench Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.