The Lucky Lunar wheel has an awesome full core design that helps reduce weight, which ultimately helps make your scooter feel more balanced. It comes in two different diameters being 110mm, and 120mm. 110mm is the industry standard and will fit every fork/deck that we carry. 120mm is slightly larger, so make sure you have the appropriate fork/deck. This wheel is also sold individually, so be sure to increase the quantity to 2 if you need the pair! Like every Lucky wheel, these feature their Lucky Rebound Technology! Their urethane formula is designed to absorb more impact, and be incredibly smooth and fast.