Ace took everything you loved about the AF1s; stronger hangers, stronger baseplate, higher grade aluminum (with T6 heat treatment), non-slip alloy steel axles, re-threading axle nuts, refined bushing and washer shapes, hand-poured 96a pivot cup, and lowered them down to keep your stable and smooth. 49mm height Comes with axle rethreader hollow kingpin 91a top bushing, 86a bottom bushing 55 = 8.5" axles