The pro vibe 7075 aluminium alloy track bar 318mm is a durable and strong 7075 aluminium track racing drop handlebar for oversized 318mm clamp diameter the 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 with a specific track shape designed for speed and stiffness and wrist clearance when sprinting the full oversized 318mm diameter top section reduces unwanted flex