These Wheels are created by Skate One Corp., source of the finest, most innovative skate wheels in the industry, since 1976. these wheels are poured in our own Santa Barbara, California factory, where we create unique urethane formulations for specific skate terrains. these wheels are created with the highest quality materials in order to provide higher performance and longer life, creating true value for skaters. Even though the initial price is somewhat higher, the actual cost per day of using these wheels is only a fraction of the cost of existing lower priced wheels! The higher initial cost is totally mitigated by their longer life, making them very attractive to both the performance-oriented longboarder and the cost-conscious skater. these wheels recommends Bones Swiss Bearings.