Okay guys and gals, this may seem like a stupid question, but I have an old Cilo bike that I wanted to dress up with a vintage "deco" style chainguard which means doing away with the front derailleur and going to single chainring crank. Is it possible to convert a double ring crank to a single or do I have to buy a single? Also I think I remember Campy made a single shift lever set at one time. This will be a five speed since I want to retain the old five cog freewheel. It's just a potential project so feel free to call me crazy or whatever, but I love the look of the chainguard and don't have the proper bike that I can use it on. The chainguard cost more than than what I paid for the bike. The Cilo pesently has Campy Victory components, vintage fenders, racks, and vintage French lights. It's all about appearance rather than authenticity.