The TiLT Formula Deck is the successor of TiLT's original deck, the Theory. The Formula features a cut out on the bottom of the deck which reduces weight, and is better than a completely flat bottom because it produces less friction. Less friction means smoother grinds! The updated welded dropouts will also make for extremely smooth grinds. The Formula comes in 5 different sizes, this is the 5.5" wide by 21" long version. This deck is going to be ideal for the younger street riders looking for width in a responsive and progression focused size. It will also be great for park riders who want the additional foot space, but don't need the extra length.