Ritchey Comp Butano Drop Handlebar - Aluminum 44cm 31.8mm BlackRitchey Comp Butano Drop Handlebar 31. 8mm Clamp 44cm Black. The standard for which Ritchey performace is based on. Race worthy components priced for the casual cyclist. Butano is a short and shallow compact flared drop bar. 6061 alloy Clip on compatible TECH SPECS Bar Clamp Diameter (mm) 31. 8 Bar Top Style Round Color BB Black Accessory Mount Diameter 31. 21 Drop Bend Style Compact Cable Routing Internal Width Measurement Center Width 44 Defined