Shred at the park and work on those buck wild manuals with the Bighead 54mm 99a skateboard wheels from Spitfire. This pack comes with four wheels and each wheel boasts Spitfire's classic wheel shape which brings speed and control, while the flat spot resistance comes in clutch and adds ample durability as well! These wheels have a 99a durometer hardness rating, making these perfect for street shredders and park shredders alike.