The Deda Elementi Presa Handlebar is the carbon-fiber version of the Deda Zero100. It's a product of the new Deda Rapid Hand Movement (RHM) design initiative. Deda noticed that more and more pro riders have been dropping their bars in relation to their saddle. As a result, it seemed that riders were spending less time in their drops. So, rather than raise the bars, something a rider might be loath to do because he likes the position of the tops for climbing, they shortened both the drop and the reach of the bars. Shorter than a traditional shallow drop handlebar.
This bar is an iteration of RHM that appeals to traditionalists. The drop is a fairly round curve, though the radius of the curve is tighter at the top and increases as it goes down. It isn't quite a traditional, even radius that you'd find on Deda's deep and shallow traditional-style drop bars, but it's still fairly round. Deda calls this curve the Continuous Incremental Radius, a patented design. They state it overcomes the limits of "anatomic shape, which allows you to hold the handlebar in only one position." An interesting admission considering they sell loads of anatomic bars.
The Presa, like all Deda road bars, can have aero bars mounted on the center section. Deda only recommends use of their own aero bars, but others can fit. Deda would prefer people use Deda stems with their bars, but the warranty isn't contingent on the bars and stem being from Deda. They also say that even though Deda measures clamp area of the center section of their bars as 31.7mm, it is essentially identical to other manufacturers' 31.8mm (save manufacturing tolerances). Both are 1.25", just Deda takes the metric fraction 31.75mm and rounds down, whereas everyone else takes the same fraction and rounds up.
The Presa has 128mm of drop and 77mm of reach. Both are measured center-to-center. The bar comes in 42, 44, and 46cm widths, measured outside-to-outside. The finish is Gloss Carbon.
The actual weight of the Deda Presa Carbon Fiber Handlebar: 42cm is 232g. 46cm is 230g.