Here's my vintage bike that I converted to a fixed bike
Started as a 10 speed, with Huret derailiers and downtube friction shifters.Currently running the original 52t chain ring with the 40t removed, with 170mm swaged cranks, changed to a Miche track cartridge bb and 17t dicta sprocket on the back. Next up is to convert to aero brake levers with Tektro extra long dual pivot calipers. It's still running 27" wheels and the current gb single pivots have a huge 70mm drop as it is
Then I might get a new chainset with some 165mm cranks. Still getting used to starting after stopping and not being able to coast, but really enjoying it 
Started as a 10 speed, with Huret derailiers and downtube friction shifters.Currently running the original 52t chain ring with the 40t removed, with 170mm swaged cranks, changed to a Miche track cartridge bb and 17t dicta sprocket on the back. Next up is to convert to aero brake levers with Tektro extra long dual pivot calipers. It's still running 27" wheels and the current gb single pivots have a huge 70mm drop as it is

