Built for our gravel bikes the uniquely styled Ritchey Classis VentureMax Drop Handlebar is a blast from the past to take on big dirt miles. We'll be running the futuristic(for the time) classic handlebar on our aggressive gravel bikes and relishing the angry gravel we find along the way. This bar features a unique shape and easily attaches to any stem with a 31. 8mm bar clamp diameter.