Disc Fix Cog
#1
Thread Starter
A little North of Hell
Joined: Mar 2006
Posts: 4,892
Likes: 4
#5
I like bikes
Joined: May 2007
Posts: 59
Likes: 0
From: Denver, CO
Bikes: Soma Rush, Brew Custom, KHSAlite, Flyte SRS-3
found this on mtbr forums
the website:
https://tomicog.blogspot.com/
the purpose:
To supply disc fixy cogs to a small niche market
in order to cover my race season 'budget.'
Need to add the purchase option/shopping cart dilly
to the website, then it'll be good to go. Target is to
take orders and begin shipping the first production run
first/second week of January. Final price is gonna
be maybe $25, maybe $30 ea, $4.95 to ship up to four.
Will spam again when it's all official.
peace,
Tomi
__________________
I have a blog!
tomi-mcmillar.blogspot.com
the website:
https://tomicog.blogspot.com/
the purpose:
To supply disc fixy cogs to a small niche market
in order to cover my race season 'budget.'
Need to add the purchase option/shopping cart dilly
to the website, then it'll be good to go. Target is to
take orders and begin shipping the first production run
first/second week of January. Final price is gonna
be maybe $25, maybe $30 ea, $4.95 to ship up to four.
Will spam again when it's all official.
peace,
Tomi
__________________
I have a blog!
tomi-mcmillar.blogspot.com
#6
Senior Member
Joined: Jul 2006
Posts: 51
Likes: 0
I got in a Pisgah Mountain ride Sunday on an early pre-production model of the Tomi-Cog. Gotta say it was hiccup free, and it will be well worth the money if you're looking to try off-road fixie on the cheap.
Pics and....
https://teamdicky.blog.com/2459292/
Video:
https://teamdicky.blog.com/2454116/
Pics and....
https://teamdicky.blog.com/2459292/
Video:
https://teamdicky.blog.com/2454116/
#8
Senior Member
Joined: Mar 2006
Posts: 166
Likes: 0
From: Northern California
Bikes: Continuously changing assortment. Do Two Unicycles make one bike?
I drilled one out myself.. but its definitely off center. I would readily dish out some money for a 6bolt disc cog that doesn't have me waiting a more than two weeks
if my Boone cog ever does come... I will immediately take it over the Paul comp and ask if he'd be nice enough to make me extras (backups.. if you will)
#11
I canceled my order for a Boone Ti cog and ordered a Tomicog. I emailed Boone, and after having ordered it 9 months ago, they still don't have a time frame on when it will be done. Definitely not worth the wait.
Last edited by mihlbach; 01-05-08 at 12:35 PM.
#12
spin
Joined: Jan 2005
Posts: 1,170
Likes: 0
From: Champaign, IL
Bikes: raleigh m-60, azonic steelhead, schwinn world sport fixed gear
Ok i just received mine in the mail today and then I went out and picked up some bolts for disc rotors. one thing that has me puzzled is that the bolts are considerably smaller than the holes in the cog. Is there a second type of disc brake bolt that has a larger flange near the bolt head that would work better and fit tighter than the ones I have?
Last edited by The LT; 01-22-08 at 06:35 PM.
#14
Southpaw Fixed?

Have a new cog from Tomi. They are really nicely made.
The holes "stretched" one the one I made. I think I overheated the cheap steel when I drilled it. By the way, 38x18 is too big for the steep singletrack around here.
Anyone have a 5 bolt 110BCD silver 34 or 36 they want rid of?

Have a new cog from Tomi. They are really nicely made.
The holes "stretched" one the one I made. I think I overheated the cheap steel when I drilled it. By the way, 38x18 is too big for the steep singletrack around here.
Anyone have a 5 bolt 110BCD silver 34 or 36 they want rid of?
#16
LóFarkas drilled his own cog. Apparently, he needed some industrial machinery to drill through the Shimano BMX cog, but he eventually got it done.
#17
spin
Joined: Jan 2005
Posts: 1,170
Likes: 0
From: Champaign, IL
Bikes: raleigh m-60, azonic steelhead, schwinn world sport fixed gear
#20
https://www.fixedgeargallery.com/arti...mson/surlyhub/
With the wheel dished symmetrically, I get about a 46 mm chainline. That works for me since my crank chainline is 45.5 mm. A true rear disk hub will give you a wider chainline than that. But there is really no reason you can't get the proper chainline, given the multple ways you can adjust it. (1) you can redish the wheel and adjust axle spacers, (2) move your bolt-on disk cog towards the dropout with some washers, (3) move the chainring with chainring spacers, (4) or change the BB spindle. You can usually cure a severely f'ed up chainline by adjusting the first three things without having to buy a new bottom bracket.
Last edited by mihlbach; 02-02-08 at 01:52 PM.
#21
Senior Member
Joined: Feb 2007
Posts: 290
Likes: 0
From: San Francisco
Bikes: Univega Gran Premio, Custom MTB/SS/Commuter, Vintage Miele Fixie under construction
#23
Senior Member
Joined: Feb 2007
Posts: 290
Likes: 0
From: San Francisco
Bikes: Univega Gran Premio, Custom MTB/SS/Commuter, Vintage Miele Fixie under construction
wow, looks great, i have a single sided track rear that I would like to replace with a tomicog (which I have) with a front mtb disc hub re-axled to work in the rear. If now ill go with rear mtb SS hub, but I have 120 rear spacing, what is your rear spacing? MTB standard?
#24
Southpaw Fixed?

Have a new cog from Tomi. They are really nicely made.
The holes "stretched" one the one I made. I think I overheated the cheap steel when I drilled it. By the way, 38x18 is too big for the steep singletrack around here.
Anyone have a 5 bolt 110BCD silver 34 or 36 they want rid of?

Have a new cog from Tomi. They are really nicely made.
The holes "stretched" one the one I made. I think I overheated the cheap steel when I drilled it. By the way, 38x18 is too big for the steep singletrack around here.
Anyone have a 5 bolt 110BCD silver 34 or 36 they want rid of?
Is that helicoiled, or a tandem crank?







