With reference to FIG. 1, a truck 1 for a skateboard 2 comprises a base structure 3 detachably secured to the underside 30 of the skateboard deck 4, a yoke assembly 17 having spaced-apart upper and lower portions 17a, 17b flexibly located by the base structure 3, a king-pin assembly 5 including a king-pin 7 for clamping the base structure 3 and the yoke assembly 17 together, and a pair of skateboard wheels 6 carried by the truck 1.