ATOM Boom Hp Nylon Hollow Core XXFirm White 59x38 *Light weight (59 x 38 Nylon: 83 grams)(59 x 38 Alloy: 86 grams).Available in 3 sizes and Two Different Hubs 59x38mm XXFirm White 62x38mm XXFirm White 62x44mm XXFirm White FREE Atom Wheel Bag and Free Devaskation Tool Bag with Purchase..