The Hi-Lo Kryptonium Roller Hockey Chassis is the first chassis of choice for pro roller hockey players and can be found on the brand new Mission Inhaler FZ-0 skates. Its design was made to drastically reduce weight without sacrificing an ounce of durability. The very popular Hi-Lo setup arranges the wheels with (2) 80mm's in the back and (2) 76mm's in the front to increase maneuverability, power, and balance. The Kryptonium chassis kit comes with 2 chassis, (8) 6mm axles, 8 long sleeved 608 bearing spacers, and 1 axle tool.