Read the Wiggle Blog Review of the Pro PLT Alloy Double Butted Ergo Compact Handlebar here 2014 aluminium is a high strength aluminium alloy commonly used in the aircraft industry & a wide variety of high strength engineering applications making it the ideal choice to produce this lightweight, strong & reliable handlebar. For further weight reduction the aluminium has been double butted, keeping the strength where it is needed & reducing the wall thickness where vital grams can be saved. The oversized 31.8 mm clamp diameter reduces unwanted flex under high load by increasing strength & rigidity.