I see what you mean now! Well, I've never seen a set of (good) shocks that don't self-extend, but theoretically that shouldn't be required for the shock to do it's job, right? I mean, mechanically it's just supposed to be a damper, which absorbs some of the energy from compression or extension. The springs are supposed to handle the job of suspension return from compression. Why not try them out and see what they do?