Sold as a set of 2 Trucks. Ace 44 our Classic 2.125" (52mm) tall truck. This is the size that is just now becoming a standard offering by others. Our Ace 44 allow you to do it all and excel! Whatever, wherever you are trying to grind, Ace 44's will take you there with stability. Need some flick in your set-up? 44's won't slow you down!