Purchased two of these from VO with great hope.

Installed one on a utility bike with a heavy front end ... drum dyamo front hub, fender, massive stem and handlebars, heavy controls, light, basket, etc.

I kept moving the clamp down the down tube, and the spring kept having no apparent effect on the floppiness of the fork. Finally it seemed to start to work, but then I turned the fork a little to check the tension and I "sprung" the spring, bending the spring where it wraps around the bracket attached to the fork.

Fortunately, I had bought two, so I moved the clamp up and put the 2nd spring on. It sort of works now.

My neighbor has a one of those Gary Fisher city bikes and it has the return spring stock, probably attaching to a little lug under the dt. The spring is small and stout, and you can really feel it trying to pull the fork back to straight ahead. This is what I was expecting from the VO product.

I was pretty disappointed. The unit is large and heavy and the spring is surprisingly weak. Wish I could say I recommended it. It might work on a bike with a light front end, but there are many other features I would add to a bike before this thing.