The pro vibe 7s compact handlebar lightweight and strong 7075 aluminium road racing drop handlebar for oversized 318mm clamp diameter ro vibe 7s compact handlebar features 7075 aluminium is a high strength aluminium alloy commonly used in the aircraft industry making it the ideal choice to produce this lightweight strong and rigid handlebar oversized 318mm clamp diameter reduces unwanted flex under high load by increasing strength and rigidity for further rigidity the