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No Crybabies
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Discussion Starter #1
Anyone make an off-the-shelf fixed frame with rear disc now? I can't seem to get the attention of custom builders (Vanilla) to do this for me.

Spent last week in Palm Springs (80+ degrees -- poor me) riding up and down "Tram Way," a huge steep climb with corresponding descent, where I melted the Tufo glue strip out of my front tire/rim braking on the long descent. So, back in the market for a rear disc equipped frame.

Thanks.
 

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grippy...
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122 Posts
Problem #2

...finding a fixed disk rear hub. I think Paul and maybe Phil Wood do them on occasion, but they aren't easy to find.

The Paragon dropouts shown above are pretty cool, Moots is one builder that's making use of them (hardly the off-the-peg solution you're looking for...). I can't think of a disk frame that would work as a fixed, except for the Karate Monkey http://www.surlybikes.com/karatemonkey.html
 

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What'd I do?
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1,775 Posts
You can try a 29" mountain bike, but the top tubes are longer than on a road bike, so sizing may be a problem. The Kona Unit 2-9 has sliding dropouts, and the Karate Monkey and the Soma Juice have fork ends with disc mounts.

A more obvious solution for the immediate problem: get a set of clincher wheels for rides like that. Probably easier and cheaper than a new bike. You could also just add a rear brake to distribute the braking power a little better.
 

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Premium Member
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21,910 Posts
3 words....

Fixed said:
Anyone make an off-the-shelf fixed frame with rear disc now? I can't seem to get the attention of custom builders (Vanilla) to do this for me.

Spent last week in Palm Springs (80+ degrees -- poor me) riding up and down "Tram Way," a huge steep climb with corresponding descent, where I melted the Tufo glue strip out of my front tire/rim braking on the long descent. So, back in the market for a rear disc equipped frame.

Thanks.
Eccentric Bottom Bracket.


Now for a few more words. All you have to do is ask a custom builder to build you a SS road bike with an eccentric BB (you use the eccentric BB to take up the chain slack without moving the brake surface around (fairly common in SS ATBs)), track ends and a disc brake fitting. Gunnar/Waterford for one ought to be able to take care of your needs.

Or go to that custom frame show in San Jose and ask around.
 

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NeoRetroGrouch
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6,491 Posts
Fixed said:
Anyone make an off-the-shelf fixed frame with rear disc now? I can't seem to get the attention of custom builders (Vanilla) to do this for me.

Spent last week in Palm Springs (80+ degrees -- poor me) riding up and down "Tram Way," a huge steep climb with corresponding descent, where I melted the Tufo glue strip out of my front tire/rim braking on the long descent. So, back in the market for a rear disc equipped frame.

Thanks.
http://cgi.ebay.com/VAN-DESSEL-BUZZ...ryZ98083QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.com/2005-Dean-Titan...ryZ98083QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Maybe??? - http://cgi.ebay.com/05-Gary-Fisher-...ryZ98083QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

TF
 

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What'd I do?
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That would work.

Or a disc brake cross frame with an eno hub. Shoulda thoughta that.
 

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NeoRetroGrouch
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OverStuffed said:
That would work.

Or a disc brake cross frame with an eno hub. Shoulda thoughta that.
I would think that with an ENO (or any system where the caliper mount doesn't move with the rotor), it would be very difficult to keep the caliper/rotor in adjustment. - TF
 

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soy un perdedor
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839 Posts
White industries also makes an eccentric disc brake caliper adapter to go with their eccentric hub. So if you had a vert dropout frame and really wanted a disc SS/fixed, you could make it work. EBB or paragon sliders are a much more elegant solution.
 

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soy un perdedor
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RocketDog said:
White industries also makes an eccentric disc brake caliper adapter to go with their eccentric hub. So if you had a vert dropout frame and really wanted a disc SS/fixed, you could make it work. EBB or paragon sliders are a much more elegant solution.
Also, disc eno hubs are 135mm only AFAIK.
 

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Why not a front disc brake? Just need to get a new fork instead of a new frame. Could even set up your front end to have both a disc and a rim brake. A rear disc brake just sounds like added hassle and expense with little or no benefit.
 

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No Crybabies
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Discussion Starter #14
good ideas, everyone

Fixed said:
Anyone make an off-the-shelf fixed frame with rear disc now? I can't seem to get the attention of custom builders (Vanilla) to do this for me.

Spent last week in Palm Springs (80+ degrees -- poor me) riding up and down "Tram Way," a huge steep climb with corresponding descent, where I melted the Tufo glue strip out of my front tire/rim braking on the long descent. So, back in the market for a rear disc equipped frame.

Thanks.
Those are all good ideas, but I'm really looking for the most elegant solution. I'd like a rear disc that is designed in to the frame and hub. From what I can tell, it will require a custom make hub, and Phil Wood will make it. Not cheap, though. Vanilla shows what would be a perfect solution, but I can't get him to respond to my inquiries about it.

Would prefer not to go the fork route, as it requires a much heavier fork than the 290 gram Easton carbon I can use with a rim brake on the front. Adding a disc to the rear triangle adds relatively little mass, plus it allows using the rear as a drag brake down long descents, keeping the front nice and cool for quicker slowing, if necessary. This is for a bike I intend to use for timed events, to weight is an issue, even if not a huge issue.

Bottom line is that I like to do things the most elegant and least kludgey way I can. Designing the rear disc into the frame is nearly perfect, as far as I can tell; we just need someone to make it.

Thanks again. Looks like custom is the only way to go.
 

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Windrider (Stubborn)
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Try Dave Kirk

I know he's done this on a geared frame....if anyone can do it, it would be him.

http://www.kirkframeworks.com/photogallery3.htm

The obvious problem is having a disc mounting that was movable horizontally in order to "center" the Disc in the braking assembly as you changed gears and therefor Wheel position in the dropouts. That's whey the eccentric BB seems to make the most sense.

Talk to Dave, he's a really creative guy...and easy to work with. He'll also tell you if it can be done.

Len
 

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Fixed said:
Bottom line is that I like to do things the most elegant and least kludgey way I can. Designing the rear disc into the frame is nearly perfect, as far as I can tell; we just need someone to make it.
Trek has a new bike, either the Portland or the Soho, which mounts the disc caliper between the seat and chain stays. It's not the traditional location, but I thought it was a nice look that cleaned the lines of theseat stay.
 

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No Crybabies
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Discussion Starter #17
thanks

PdxMark said:
Trek has a new bike, either the Portland or the Soho, which mounts the disc caliper between the seat and chain stays. It's not the traditional location, but I thought it was a nice look that cleaned the lines of theseat stay.
Just checked those out. Look good, for multispeeds. I like the brake mounted forward of the seat stay.

Just got an email reply from Sacha, suggesting an eccentric bb with a vertical drop out rear (as others had suggested, as well). I'm wondering, though -- how do you chain the rear tire and/or adjust chain tension on the road? Can someone explain how the eccentric bb works? Thanks. :)
 

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Fixed said:
Just got an email reply from Sacha, suggesting an eccentric bb with a vertical drop out rear (as others had suggested, as well). I'm wondering, though -- how do you chain the rear tire and/or adjust chain tension on the road? Can someone explain how the eccentric bb works? Thanks. :)
One of those Treks, the Soho, I think, has an eccentric bb to convert the multi-gear beast to a singlespeed vixen. The ecentric bb on the Soho works much like your erstwhile eccentric ENO hub, except that it's the bb that is eccentric in an oversized bb shell. I think that the larger diameter of the bb, in comparison to an eccentric hub, gives a much great range of horizontal travel than the ENO hub can give.

In some arrangements, adapted from tandems, I think, the bb shell is actually split all along the bottom and bolted back together to tighten the shell around the eccentric bb. I didn't want that version on my Vanilla, which I initially wanted to make fixed w/ discs, because I thought that the relatively frequent tightening/loosening of the bb shell for fixie use would eventually fatigue the shell. In contrast, the shell in tandem usage would only rarely be loosened/tightened when the capt/stocker driver trains were ganged together, so the split bb seems fine for tandems. I bailed on the discs for my Vanilla and went with cantis.

But that Trek Soho has another sort of eccetric bb, which doesn't require the bb shell to be split. There's a bolt on the side plate of the bb that somehow tightens the bb in the shell. I don't know what surface the tightening bears against, so I don't know how it would hold up to fixie usage, but it does seem to solve the problem of fatiguing a split bb shell every time you remove the rear wheel.
 

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Fixed said:
Just checked those out. Look good, for multispeeds. I like the brake mounted forward of the seat stay.

Just got an email reply from Sacha, suggesting an eccentric bb with a vertical drop out rear (as others had suggested, as well). I'm wondering, though -- how do you chain the rear tire and/or adjust chain tension on the road? Can someone explain how the eccentric bb works? Thanks. :)
By adding extra weight to your BB.
check here for details.
 
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