• "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 the the strongest cast truck on the market." • Model 33: 7.75"-8.125" • Model 44: 8.125"-8.38" • Model 55: 8.38" - 8.6" • SOLD IN SETS OF 2 TRUCKS