Unique, yet simple, design maximizes clamping surface area while spreading the clamping force through the whole area of the sleeve with the patent-pending location nipple on the bar. With the carbon nipple, you can ensure alignment is perfect and capture the sleeve so it does not rotate. Da Bar has also been designed to a 33mm diameter in order to drop the stiffness and allow for the sleeve to slide into the 35mm clamp diameter of Da Stem. A new way of thinking about 35mm.