Make sure you're running a single-speed specific front ring. Here's the link to the rear cog Discos kit:
http://magnoliaroad.net/~whit/Discos.htm

get the chain wrap right without a tensioner. that and the discos and you can't go wrong, no ramps on the ring up front too!

GK- you runnin a BMX style (ie- non shifting) cog?
Can you run the singulator with a tighter chain?
Single speed chain?

Do it T-Brown style and use 2 burned up CD's (compact discs) with the certer cut to fit the hub body as "discos". Extra points for Prince's Purple Rain album.

-Anthony C

oh and the Duce Niner.....sick!

've never tried this myself, but I have heard that some people run their Singleators in the "push-up" position instead of the "pull=down" one. You just put the chain on the inner part of the guide wheel instead of the outside and then zip-tie the thing to the chainstay nice and tight so that it doesn't spring back. That should give you a little better wrap on the cog and chainring and can always be tightened little by little as the chain breaks in.

It may work, it may not, but It seems worth a shot.

i've got a singleator on mine and haven't had any trouble. yet (i'm sure you've cursed me now).

i've got mine in push-down mode like you, but it looks like i've got the chain a little tighter than yours without. can you take another link out?

i've got a BMX 18 cog on the back, a generic 36 up front, and an old SRAM 8-spd chain i found in the drawer. my singleator is the old one (pre big wheels around pulley), too.

Well LOOKIE here! My peeps have DIALED me in. OK, honestly I totally overlooked the ramps on the front ring and definitely will swap that out. I do have a fatty chain though. The Discos looks sick! I guess he's out of the Ti ones but the plastic jobbies look the part. I'll grab me some, mount and re-post my results.

THANKS YOU GUYS!!!

First, Make sure the chainline is perfectly straight. Second, have the right gear...Beefy non-shifting chain, and a SS big ring thats in good shape. It'd be better if you could run without the tensioner, but that may not be an option.

Another thing that seems like a pretty obscure problem, but its out there... What type of frame are you running? Is it super flexy? I've had a really flexy steel frame and had major problems with dropping the chain. I swapped my frame out for a stiffer one, problem solved.

Ok nobody has stated the obvious, which is, get a single speed frame! I hate those damn singulators! Plus with all those pulleys and guides and everything you miss out on some of the beautiful simplicity. 2 cogs, a chain, no guides. I know it is more dollars more parts, but you're a bike geek you can handle it.

white industries eno eccentric hub! works great. never had a problem.

Thanks Brian G! Indeed I considered this and is SO clean looking but....ka-CHING! That sheeit is bank!

Or you could consider running a halflink chain. If you're lucky you can get the right gear ration without a tensioner that way. I run 32-17 on my old 94 Kona FireMountain with vertical dropout that way.

Anders, Denmark

Interesting an thanks Anders! When you say "halflink" chain, can you describe what yo mean? Thanks man! Go Parbo!

Sure, the links are half length, which means you have a better chance of fitting it without the use of a tensioner. I guess a BMX shop will have them. KMC, TheShadowConspiracy, Reluctant are a few brand that make them.

You may have to fiddle around with a few different size cogs to make it work. Or you may not, people get lucky ;-) Another solution is to file or grind one side of the axel, to make a tight chain fit better. Have you seen Sheldon Browns page on the subject? sheldonbrown.com/singlespeed.html