RKT Roller Skate Kits - TricycleCapacity 39 tons Available as a complete kit Endless hardened roller chain Low height design for increased stability and safety. Heavy duty construction with minimal maintenance required. Kit comprises of three skates with all necessary accessories. Center front skate fitted with turntable for easy change of direction. Twin rear skates supplied with tie bar for increased stability. RKT kit comes in a metal storage case.