Abstract: In a truck having a base plate for securing to the underside of a skateboard deck, a spring member such as a plate spring is joined to the base plate by one end and carries a wheel axle near an opposite end. The axle-carrying end is flexed away from the base plate to be biassed into engagement with a post secured to the base plate to depend from it. In use, the spring member is adapted to twist about its longitudinal axis whenever the skater shifts his weight on the deck, the spring member riding on the post either directly or through the intermediary of a bearing member.