Forged road stem. Light alloy 6061, drop forged, heat treated T6. High precision machined. Flip-flop reversible. Available in ultra short and special 60 and 70 mm lengths. Suitable for assembly with Deda Piega handlebar (anatomic).
The diameter is the main factor of magnitude in the moment of inertia of the section of the handlebar. The moment of inertia is what defines the rigidity of your handlebars - what all riders are looking for, as insufficient stiffness causes dissipation of your precious energy.