This model is designed to allow you to set the handle at an angle without discomfort while keeping the position low. The body stretches from a low column height of 1.4 inches (35 mm) to an exquisite 77° (33 mm) and is smart with a 0.3 inch (7.5 mm) offset at the center of the handle clamp. The tip of the handle clamp bolt is all inside the body and is designed to not show protrusions from riding position. The OnebyESU mark is a stealth type that is invisible and exhibits a sense of presence depending on the angle of light hit.Bolts are made of stainless steel. Body : BK Clamp : BK Material : 6061-T6-alloy Size : 70, 80, 90, 100, 110, 120mm Steerer Tube : 1-1/8" Stack Height : 35mm Off Set : 7.5mm Angle : 77° Clamp Diameter : φ31.8mm Weight : 143g (90mm)