The Tour i and Tour iX are four-piece balls that feature Callaway's new ‘intertia technology', which is designed to reduce spin when the ball is struck by the driver, yet to also enhance feel. The HEX aerodynamics have been updated and the balls come with a new and softer thermoset urethane cover. While the Tour i is intended to offer ‘unmatched greenside control', Callaway hopes the Tour iX will be the longest ball on Tour.