The Pro Vibe Di2 Alloy Handlebar is constructed of 7075 aluminium, a high strength alloy commonly used in the aircraft industry making it the ideal choice to produce this lightweight, strong and rigid handlebar. The handlebar features an oversized 31.8 mm clamp diameter which reduces unwanted flex under high load by increasing strength and rigidity. For further rigidity, the 31.8 mm diameter is carried across the top of the bar, keeping the strength where it is needed and reducing the wall thickness where vital grams can be saved. The Vibe has been developed with Di2 in mind, offering ultimate integration for maximum aerodynamic performance and ultra-clean styling. The specially-positioned cable ports enable you to feed Di2 cables through the system. It s also fully compatible with the new Shimano Dura-Ace R9100 Di2 junction box, which can sit at the end of either drop instead of a bar plug.7075 Alloy construction31.8mm Clamp diameterShimano Di2 compatibleApprox. Weight: from 245 grams