Ace AF1 77 Polished skateboard trucks. 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 smooth as silk response. Refined bushing and cup washer shapes for a cleaner turn. Machine-faced hanger ends for precise bearing contact. Axle width: 9.5".