Chain Tensioner for Balloon Tire Bike?

[bairdco]

If you want to over-think this some more, with your drop-outs, you're moving your wheel up or down on an angle, not straight back, which complicates all your calculations.

 

[RadRacer203]

Got it! I decided to put on a worn out chain I had laying around, and that pushed the wheel back almost perfectly, but it still rubbed just a hair, so I decided to put a very small dimple in either side of the frame, so now it fits perfectly with about 1/16" of space on either side of the tire. I'm really glad I could get these tires on without the chain tensioner. They really make the bike. They just fill up the fenders so well. While the wheels were off I decided to fix the rattling too by putting silicone between the fenders and brackets and then a couple shims to take up the slack where the rivets had loosened up.