Contour race tips are an elastic with a sewn webbing on top and nylon washer to fit over the ski. Cut the skins, fold them back over themselves, sew or rivet the skin in place, and voila! Race rip ready.
How skinny of a tip and skin can I use these on? I have some 35mm montana skins I use on xc race skis that the tip finally disintegrated on.
As for attaching the skins to the ski, these race tips are designed to be used with skis that have a notch at the tip. These race tips can be used on nearly any skin width, just trim the edges until the form a narrow enough strip to fit through the bungee race tip. Then fold the skin material back over itself, and sew or rivet the skin in place.