Thanks, Bill. Mine is raised off the ground on a trike kit as if on a jack stand. And it won't stay down; it springs back up on its own. Might be because it's rubbing against a metal part of the underside of some protective covering attached to the frame. But you're saying it should stay down on its own and not spring up, right?I wouldn't say it locks but the resistance of the spring keeps it down not the weight of the bike.