Originally Posted by noriel
I'm gonna fix up a monocog 29er, but I'm building it up from the frame. The 110mm spacing isn't too bad of a problem if you're willing to build up a wheel with some track hubs that can be respaced. My Promax SBs have washers that can be removed to givea 110mm spacing. The only problem would be making sure the hubs were dirt-worthy. I wanted to run a disc rear on a fixed hub, and one nice solution are atomlab's Disk Adapters. The six bolt mount just threads onto the freewheel thread, and there's a caliper mount for your frame if it wasn't equipped with tabs.
Okay. The Monocog 29'er is new this year, and has standard 135mm MTB spacing, same as the new '06 monocog. The older monocogs had 110mm rear spacing, and came with disc hubs starting around '03 or '04 I believe. They all came with V-brakes though.
The atomlab Disk Adapters that thread onto the freewheel threading will work for braking, and you can still have to bolt on a fixed cog to the stock disc-mount. You can use the stock wheel, flip it, bolt on your adapter+disc on one side, and bolt on a cog, and have a fixed, disc-brake equipped 29'er MTB very easily. Even less hassle than you planned on.