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What?
These are laser cut, Type 304 stainless steel 1/2" pitch chain drive bicycle cogs. They are cut to match a standard 6-bolt mtn bike disc rotor mount. Laser etched tooth count and logo, ground tooth bevel. Not intended for use with 9-speed chains, spend 15 bucks and get yourself a SRAM PC-58. Available in 16t, 17t, 18t, 19t & 20tooth.
How?
- 1: Remove rear wheel from bicycle.
- 2: Unscrew 6 bolts and remove disc rotor.
- 3: Bolt TomiCOG to hub.
- 4: Flip wheel and remount with chain on the TomiCOG.
- 5: Enjoy the journey of a fixed gear.
Disclaimers:
If your singlespeed uses a springy type device to achieve chain tension, you can not run as a fixed gear. If you do not understand what I mean, do some research and come back later.
By using a TomiCOG, you will not be able to also run a rear disc brake. Without a rim brake option YOU are the source of rear wheel braking. If you do not understand the implications of that, then the TomiCOG is not for you.
I highly recommend running a front brake at all times.
By using a TomiCOG, you will not be able to also run a rear disc brake. Without a rim brake option YOU are the source of rear wheel braking. If you do not understand the implications of that, then the TomiCOG is not for you.
I highly recommend running a front brake at all times.
Purchase!
Cogs are $30 ea.
Shipping is via US Postal,
$4.95 per envelope of 4.
International shipping
is $9.95 per envelope.
Shipping is via US Postal,
$4.95 per envelope of 4.
International shipping
is $9.95 per envelope.
ChainRings!
Yep, I'm also making chainrings now. 'Stock' sizes are 32t & 34t, in both 102(XTR) and 104 4 bolt patterns. Pricing is $40 each + shipping (~$5).
Can also make custom rings, shoot me an email, we'll see what can be done.
Can also make custom rings, shoot me an email, we'll see what can be done.
Get in Touch
Why?
You tell me.
I'd love to hear the stories of TomiCOG adventures. Send me your pics and trip/race reports and I'll do my best to keep the story rolling on this site.
I'd love to hear the stories of TomiCOG adventures. Send me your pics and trip/race reports and I'll do my best to keep the story rolling on this site.
Who?
yeah, who?
I'm a bike nut. I love to ride bicycles. I love to pedal bicycles, pedal, pedal, pedal. Mtn bikes are my niche, with a whiff of closet roadie. Engineer by trade, amazed by the physiological machine, heard a knocking at the door. Inspired by the 24hr legend of Hugh Jass, I embarked on my own fixed gear journey. Couple seasons and a handful of hundreds latter, here I am, next step up the ladder, just trying to build upon the foundation. I've achieved some goals and discovered new ones to chase, but it's really nothing new. When you take a look back, we're all just chasing ghosts.
I'm a bike nut. I love to ride bicycles. I love to pedal bicycles, pedal, pedal, pedal. Mtn bikes are my niche, with a whiff of closet roadie. Engineer by trade, amazed by the physiological machine, heard a knocking at the door. Inspired by the 24hr legend of Hugh Jass, I embarked on my own fixed gear journey. Couple seasons and a handful of hundreds latter, here I am, next step up the ladder, just trying to build upon the foundation. I've achieved some goals and discovered new ones to chase, but it's really nothing new. When you take a look back, we're all just chasing ghosts.
6 comments:
Interesting... also make some pretty ones for ENO cranks.
Just an idea...
Surly's doesn't offer their stainless steel cogs in 4-bolt patterns above 36t.
I'd love to have one in a 42.
Nobody makes steel chainrings in that range that I know of.
yes! let me know when you have some to buy
Boone used to make one in a 31, but Blackspire says it is unpossible. you wanna give it a shot? Irregardless i'll take a 32t and/or a 31.
yeah, working on it, I know a 29 can't be done, didn't look at 30 or 31 yet.
Still putting on miles to see how it holds up.
Very cool. What BCD's are you planning on, and more important for me: how hard to do a strange one? I need a 34t 4 bolt x 110mm (Rotor)
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