Just learned about these cogs: https://tomicog.blogspot.com/ that bolt onto the disc side of a hub. Will these work with the stock monocog hub to give a proper chain line? Any other issue with these?

Cost for two tomi cogs = $70

Cost for rebuilding wheel = $125 + $50 cog/lock ring + $? new freewheel for the new hub

If this works seems like a much better option.

Looks interesting. Don't see why it wouldn't work. Make sure you use some strong bolts though.

The chainline is perfect on my '08 Monocog 29er. I have a 19 tooth on mine and it is fun, but gets pretty busy on technical trails.

What does busy mean and did you order from tomi cog? What was the turn around time like on your order?

Busy means there is a lot to think about when your spinning like crazy and trying not to strike the pedals on rocks. I've hung up suddenly enough to go over the bars. If you plan to use it for off road, then get a tooth or two smaller than what you normally run SS. I ordered from tommy, and the turnaround seemed reasonable. He states up front that he only ships orders once a week because he has a real job besides making cogs in his garage.

I have ordered two cogs from Tomicog. Seemed totally legit to me. And I got it fast, as I recall. The cogs themselves are pretty simple and are not super-pretty, but they work perfectly.

jim

+1 The conservation of momentum you get on a fixie just about cancels out the taller gearing in climbing. You'll also thank yourself on the downhills when you aren't spinning so fast. Riding fixed off road is incredibly fun and also rewarding in the skillset you will aquire. It will pay off on the trails and in traffic.

The cog gives a perfect chainline on my '07 'Cog9er. Oh, and mine's a drilled Dx cog. Only 3 holes, and disc bolts. For the record, water bottle bolts will fit, and are strong enough.

-Rob.

lol @

"clicky make big on all.
longer slideshow on the Smug
good times."

Thanks for the info guys.

Ordered a 17t and 19t cog to go with my 32t chainring.

Should give me 54.6 inches and 48.8 inches. Have run the 32x20 stock freewheel that it came with for a while. Have 32x18 free on it right now. Was told most people here run 50 gear inches so I think 32x17 fixed will be perfect.

Chainline will be set up in the range of a MTB freewheel, around 52 - 54mm, will line up with most outside chainring positions on a MTB crank. Water bottle bolts or disc brake torx head bolts work just fine. I run 52 gear inches off road, single or fixed.

I know Tomi personally and will vouch for him. Good guy filling a void that needed to be filled.

Mounted up


In Action

Check out the leVel hub system, very similar to a tomicog setup...

UC stocks them if you want to look at prices / pics

The Level hub/cog is good, but a bit different than the Tomi Cog which lets you use an existing disc hub to convert to a fixed gear. And if saving money on a wheel build is the name of the game (see first post), the Level system isn't going to fit that bill.

True, the level system is proprietary with their hubs and cog.

If he's going to keep the stock redline wheel / hub then just getting a tomicog should do the trick. I was posting more for if he was thinking about rebuilding the wheel, or for people reading about tomicog and thinking of building a wheelset from scratch with a mb disc hub.

FWIW, other than the ability to quickly change cogs, I don't see an advantage to the LeveL hubs over a disc/Tommi Cog.

-Rob.