Upgrade your trucks with the Krux Hollow Downlow Kingpins! Make your trucks lighter and never hang up on smiths or feebles again! Lighter and Lower than your crusty old kingpin! Fits in most tall and low trucks. 4mm lower than a standard height kingpin! 4 grams lighter than a standard kingpin! How is it lower? The top piece is the washer and you don't have that extra length caused by the kingpin nut.