The HI-LO Aluminum Roller Hockey Chassis is highly regarded among pro roller hockey players worldwide and is one of the most popular wheel set-ups. The HI-LO aluminum frame is designed to hold 2 x 80mm wheels in the rear with 2 x 76mm wheels in the front, and now has an even sleeker look than before. Attack angle becomes much more aggressive for increased maneuverability, power, and balance. The aluminum chassis kit comes with pair of chassis, 8 x 6mm axles, 8 x long sleeved 608 bearing spacers, and 1 x axle tool.