* Ace Trucks AF1 Inverted Hollows are one of the most technical skateboard trucks made by Ace yet, with improved materials and detailing * Brand new inverted kingpin technology with precision tuning, designed with channel lock grooves placed around the kingpin, keeping your trucks at the perfect tightness * Lowest sitting kingpin on the market, helping you smith and feeble grind without your kingpins catching * Featuring a re-threading axle nut, making sure you can change wheels or bearings hassle-free * Bonus adapter tool for the Allen kingpin adjustment, designed to fit in every tool * Hollow reinforced axle result * Machine-faced hanger ends for precise bearing contact * True T6 heat-treated baseplates and hangers * SAE4140 Alloy steel non-slip axle * Top Bushing: 12mm tall / 94a hardness * Bottom Bushing: Bottom 14mm tall / 86a hardness * Hand-poured 96a urethane pivot bushings for increased control * Oversized axle for decreased bearing wobble * Compatible deck width: 8" - 8.5" * Axle width: 8.25"