Krux USK 3.5 Downlow Trucks Our Price $44 per set of 2 USA USA USK.... The United States of Krux stand for life, liberty, and the pursuit of hangup free Smith Grinds. The Krux LTD USK trucks feature a blue hanger and a red baseplate. With Krux&39;s signature downlow allen head kingpin for the smoothest grinds.