Mindless longboards RK 7.0" trucks green purple or pink Maintain stability at high speed with the new Mindless RK Trucks! The 7.0" RK is a reverse Kingpin truck which makes it ideal for carving at high speed as well as aiding your stabilisation. These trucks allow you the option of adjusting the caster angle through the hanger, and come fitted with 78A SHR cushions as standard.