Product Details:Superb set of clip-on aerobars that attach to handlebars with a diameter of 31.8mm,Designed for time-trial and triathlon riders, they’ll ease you into an aerodynamic but sustainable position where you can still generate maximum power,60mm of adjustability upfront suits time-triallist and triathletes looking for a greater stretch in their all-out efforts, and triathletes seeking a more conservative stretch to conserve energy for the run,30mm of elbow pad adjustability suits riders a more flexible riding position,20mm, 40mm, 60mm spacers are available in which riders can optimize the stack height seeking for the most aerodynamics with the best ergonomics,Weighs just 450g (Zero stack),.Reliability: Controltech USA knows the combination of sound engineering and high-quality materials practically guarantees the lifelong performance you expect. They never compromise our designs at the expense of low-quality materials. They use only premium grade raw material of aerospace quality.Ingenuity: Controltech is, and always has been, a global leader in component design. The state-of-the-art manufacturing technology would be nothing without the cutting-edge innovation of our Global Research & Development Team.Quality: A precise, unflinching view of manufacturing tolerances and meticulous craftsmanship are the hallmarks of Controltech components. Craftsman-level alloy welding and carbon layup are hallmarks of our designs. Plus of course, the use only premium-grade raw materials in the first place.Value: Though the greatest innovation takes place on the cutting edge of material science, manufacturing processes and product design, there’s such a thing as ’trickle down.’ Today’s no-expense-spared prototype is tomorrow’s easily-obtained standard. ControlTech work hard to create a range that covers every riding style, every rider and every budget – without ever sacrificing class-leading performance.