Lightweight version of Stage XI with hollow axle & kingpin. Durable all purpose truck for any type of skateboarding. 7% lighter than Stage XI 55mm tall for optimal performance and wheel clearance with wheels 56mm and under. A356 T6 Aluminum Hanger & Baseplate The best lightweight aluminum alloy heat treated to T6 condition for strength, durability, and grind feel. Hollow Chromoly Axle & Kingpin Highest quality hollow Chromoly steel for durability and weight saving. 159 and 169 models feature 6 hole universal baseplate with old and new school mounting pattern. Independent Trucks are Built to Grind and Guaranteed for Life.