Bearings make by carburising bearingcan used in most types of weather also and dirt . Street wheel have a wide with ground and have a strong ability to pass obstacle. Skateboards wheels have a good rebounds, make faster & more stable in grip, givings good control. Used for the modification of indoor and outdoor sports enthusiasts' Skateboards and longboards / the maintenance and replacement of accessorys. Suitable for , street skateboarding, asphalts road, and other place.