handlebar diameter?
 

Hi everyone,
I'm new to the fixed gear scene, and just got a Windsor - The Hour. Since it doesn't come with a brake, so I'm going to add one. I'd like to get one of the Cane Creek cross top levers, but I'm not sure what size I need (26mm or 31.8mm). It's probably a dumb question, but is there an easy way to figure it out?

26mm

31.8 is for oversized with an extended bulge

cool - thanks!

You should look into getting a set of cheap plastic vernier calipers. They are handy for measuring all kinds of round bike stuff (inside and out) if you are wondering what size component will fit int your setup. They measure to a tenth of a mm easily and accurately, which is handy because lots of bike dimentions like 27.2 mm seat posts go to tenths. Your hardware store will prolly have some for $2 or so. The set in the pic there is nicer though.

http://www.ecu.edu/glassblowing/glasscaliper1.jpg

that's good advice, too... thanks!