The airfoil top is not only fast, but it fits your hand perfectly on long climbing efforts & elegantly hides your brake & shifter cables. The ovalized hook portion of the bar fits your hand naturally, which youll appreciate as the day wears on. Of course, the Contour SL is stiff enough to fight out a sprint after youve been in the break all day. Considering its passed EFBe Laboratorys top performance racing standard, you know this bar is in it for the long haul. Please note: Zipp handlebar widths are measured from the centre to centre at the brake perch part of the bar, NOT at the bar end part of the bar.