NOTE: Sold only as a set of two (2) trucks.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.The Ace AF1, tomorrow’s technology today!Axle width: 8.25” (209mm) Hanger width: 5.6” (143mm) Truck height: 2.1” (53mm) Fits boards: 8.25” Manufactured with high-quality AA 356.2 alloy using our own proprietary casting method True T6 heat-treated baseplates and hangers SAE 4140 steel alloy axles, oversized to eliminate bearing wobble Patent pending rethreading axle nuts - no more damaged axle ends Durable Hand-poured 96a urethane pivot bushings for better response Refined suspension for a cleaner turn Top Bushing: 12mm tall | 91a hardness Bottom Bushing: Bottom 14mm tall | 86a hardness Machine-faced hanger ends for precise bearing contact See full Ace Size Chart for more technical information on all models