The all-new ACE AF1 features game-changing performance without deviating from our original Ace geometry. The AF1 is carefully manufactured using our proprietary casting process. Years in development, the ACE AF1 has a 70% increase in the aluminum’s structural integrity, making it the strongest cast truck on the market. We updated the sizing on the 44 thru 77 models for a better fit across multiple board widths. Size Guide: 22 - 7.75" axle (7.5" - 7.9" deck) 33 - 8.0" axle (7.87" - 8.125" deck) 44 - 8.25" axle (8.125" - 8.38" deck) 55 - 8.5" axle (8.38" - 8.75" deck) 66 - 9.0" axle (8.75" - 9.125" deck) 77 - 9.5" axle (9.25" deck & up