There are some funny questions you get asked a lot working a in a bike shop like "Can I put drop bar on my mountain bike" where the answer has been mostly a complicated sort of "No" for a long time and then Surly comes along and puts out a handlebar that turns that all on its head. The Surly Corner bar basically allows you to run a drop style handlebar on any bike currently running flat or mountain bike style shifters and brake levers. Is it a good idea ? Maybe, depends on the bike, but it's definitely more fun to try this than to spend a gazillion dollars on new drop bar compatible brakes and shifters and then realise you don't like the position. Comes with shims for 31.8mm if you need them. Specs: Chromoly 25.4mm clamp diameter Brake lever compatibility: Mountain 22.2mm Drop Bar flare: 41.4 degrees Bar Drop: 94mm Sweep Angle: 65.2 degrees Colour: Black