The Smoothie was inspired by one of Underground's team riders and his dopeness. The Smoothie 55mm is Nick Gibson's Signature Wheel. Nick is a smooth customer whose chill personal style goes well with his crushing skate style. Nick makes the toughest tricks look easy and is the coolest. Smoothies come in 55mm and 53mm. Like all our wheels, Smoothies are made in the USA from the finest urethane.