*6066 series heat-treated lightweight extruded aircraft aluminum for optimal strength*10 degree kingpin axle*Cold forged and black anodized solid 6061 aluminum trucks with chromoly steel axles*Fine thread steel adjustable pivot arms*Durable Delrin pivot cups*Black anodized solid 7075 aluminum kingpins with integrated auto-centering Nylock adjustment nut*Two sets of PowerDyne urethane Magic Cushions, soft and firm, for the perfect feel