Originally Posted by
.Cole
Actually all wheels are dished. Ones with gears are just dished more to one side.
Incorrect, I was making the distinction for the OP'S benefit. Front wheels may not have any dish. Thanks for playing.
Originally Posted by
Boss Moniker
If it's single speed (not fixed) you're going to want to leave the derailleur on there, but restricted to where the cog is, so as to take up chain slack. That is, unless you have horizontal dropouts, but it doesn't sound like you do. You can also get a cheap single-speed chain tensioner that's slightly more elegant and lightweight, but that's another.. $20 or something. Do not use this if you're going to go fixed, it can be done, but it's inelegant and probably dangerous.
+1 Missed the part with vert dropouts + needing tensioner.