Stiffy for Spinergy Rev-X road bike wheels

This is a "stiffener" for Spinergy Rev-X road bike wheels. Those parts were sold as a spare part in the late 90s, but it´s hard to find those. The part stiffs the carbon spokes ans prevents them from vibrating. It converts your normal Spinergy Rev-X wheels to the super-stiff ones.

Weight is about 1.2 gramms per stiffy