My fixie is a '80 Schwinn 11.8 Voyageur, solid chrome, with Sugino maxy cranks. I use a Suzie flipflop hub 17free/16fixed. Because of the hills in my area it is next to impossible for me to run strictly fixed. My rings question is I run a 43t and have mounted it on the inside position where the 39t would normally be and it is real close to the chain stay but never touches. I recently moved it to the outer position. It appears that either position has an okay chain line, runs smooth. I am thinking of riding a century later this year on the SS. Was thinking because it is a relatively flat century of using a 46t ring to get a little more speed. (22mph on flats just about spins me out with a 43t, could go a little faster but control becomes an issue) Was thinking that i could mount the 43 back to the inside position, the 46t on the outside and just remove/add a few links in the chain when I want to swap up or down. I am just not sure that riding a 46t 100+ miles is something I want to do or can do, so I have a backup plan. Anyone else do this double ring thing?