Bullet Proof is the best way to describe the urbanArtt Anvil fork. Designed to handle any thrashing you are prepared to dish out. This fork is for those who want to test their boundaries and want a product that is simple and reliable. There is a 24mm and 30mm wide version, no spacers and up to 120mm wheel height capable. UrbanArtt PRO SCOOTER FORKS are a pro scooter fork that work with the following types of compression: SCS,HIC,TCS. When you purchase UA Anvil forks, you will need to purchase a compression system (listed previously) that is compatible with your forks, as well as scooter bars that are compatible with the selected compression system. UrbanArtt SCS/HIC forks are durable forks and can be ridden on the street or at the park. The UrbanArtt pro scooter forks are compatible with the following wheel diameters: 100mm,110mm,115mm,120mm. UrbanArtt pro scooter forks are an extremely versatile fork and are compatible with any of the following wheel core widths: 24mm,26mm,28mm,30mm. To swap out different width wheels, you will need compatible spacers for the wheel width selected.