Originally Posted by operator

Unless you're willing to build a new rear wheel out of an eno. Don't bother. It's more trouble than it's worth. Magic gears are useless. The instant the chain wears any, and you'll get slack. There's also ZERO way to adjust it on vert dropouts. You get what you're stuck with even IF you find a magic gear.

The fixxer itself is a good chunk out of a new rear wheel anyways. Even if you had money to drop, this is a money losing exercise unless you *really* *really* want to be a hipster.

SS would be about 90000x easier to do, and cheaper. All you have to do is buy chainring bolts, cog and spacers an maybe a tensioner.Total for this stuff can't be more than $60.