Silca Frame Clamp Hirobel UFCFeatures The pressure clamps used on contemporary work stands were developed for round steel tubing more than 40 years ago, predating carbon fiber, aluminum, aerodynamic and oversized tube shapes, integrated seat masts, dropper posts, and suspension systems. These legacy designs assume your bicycle tubing to be both round and straight. When it is not, the clamp can impart very high point loads at the clamp edges causing finish damage, internal carbon