The Zipp Vuka Carbon Aero bar Extensions are the perfect compliment to the Zipp Vuka Clip Aero bar. All the performance you would expect from Zipp without sacrificing style. Built in mounting for Shimano bar end shifters.Zipp Speed Weaponry serves a select group of elite companies and athletes, globally located and committed to bicycle & wheelchair competition. Zipp meets customer's needs for the highest performance, superlative quality components through innovative design and manufacturing utilizing the best material and technology available.Our company is built on mutual respect, delivery on promise and fastidious attention to manufacturing details. We do this by providing exceptional customer service and aggressive marketing, supporting distribution through dedicated dealers, distributors, OE's and direct sales. Market share growth is achieved through continuous product and process improvement, adding new products, additional categories and expanding the distribution channels.