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Old 10-25-06, 08:32 AM   #1
GiantDave
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Rohloff and Surly LHT plus Disk brakes

Ok--I've searched and couldnt find anything like this so here goes. I have a friend who wants me to build up a new bike for him. Surly LHT 62CM frame with Rohloff speedhub and hydraulic brakes front and rear.
Ive never seen a rohloff let alone installed one but it doesnt look too difficult. The real problem is while there is a rohloff disk brake version, I cant figure out how to install it on the LHT frame. Anyone have any suggestions? A pic or 2 would be great too if anyone has mech/hydraulic brakes on one.
The only Surly frame with disk mnts is the Karate Monkey (that I know of). He wants the LHT, but I need professional opinions before I go any further.
Thanks for any input.
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Old 10-25-06, 09:50 AM   #2
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Originally Posted by GiantDave
Ok--I've searched and couldnt find anything like this so here goes. I have a friend who wants me to build up a new bike for him. Surly LHT 62CM frame with Rohloff speedhub and hydraulic brakes front and rear.
Ive never seen a rohloff let alone installed one but it doesnt look too difficult. The real problem is while there is a rohloff disk brake version, I cant figure out how to install it on the LHT frame. Anyone have any suggestions? A pic or 2 would be great too if anyone has mech/hydraulic brakes on one.
The only Surly frame with disk mnts is the Karate Monkey (that I know of). He wants the LHT, but I need professional opinions before I go any further.
Thanks for any input.
You might want to check out the Rohloff web site. They give a fairly concise explanation as to what is required for installing on just about any frame. I don't think that a LHT would be a good choice for a disc Rohloff. The dropouts are designed for a derailleur equipped bike which means even a non-disc Rohloff would be messy - you would require a tensioner. If the frame had disc brake mounts it would be a bit more feasible.
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Old 10-25-06, 09:58 AM   #3
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Some of the Kona frames (disc-ready Sutra, for example) have sliding dropouts - this seems like a good way to get the needed chain tension adjustment and keep disc/caliper alignment.
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Old 10-25-06, 09:58 AM   #4
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Yeah, I figured as much but I like other opinions. I'll try to talk him into a surly 1x1 or karate monkey. Thanks for the reply.
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Old 10-25-06, 11:04 AM   #5
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http://www.sheldonbrown.com/singlespeed.html#disc

I think the logic behind this for a SS would apply to a rohloff/internal hub.
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Old 10-25-06, 11:47 AM   #6
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Philatio--thanks for the link--very helpfull!
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Old 10-25-06, 12:08 PM   #7
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Quote:
Originally Posted by Phantoj
Some of the Kona frames (disc-ready Sutra, for example) have sliding dropouts - this seems like a good way to get the needed chain tension adjustment and keep disc/caliper alignment.
I am noticing that quite a few other manufacturers are adopting this idea.
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Old 10-26-06, 03:13 AM   #8
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Philatio, why would Sheldon Brown's reasons not to use disk brakes on single speeds (i.e., no flip-flop hubs, chain wear affects caliper to disk relationship) apply to a Rohloff speedhub which is built to accept a disk brake?
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Old 10-26-06, 04:02 AM   #9
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Philatio, why would Sheldon Brown's reasons not to use disk brakes on single speeds (i.e., no flip-flop hubs, chain wear affects caliper to disk relationship) apply to a Rohloff speedhub which is built to accept a disk brake?
I think you answered your own question...

chain wear affects caliper to disk relationship

However, I am just now starting to hear about sliding dropouts, so maybe Sheldon didn't consder them in writing his article.
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Old 10-26-06, 07:49 AM   #10
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I think you answered your own question...

chain wear affects caliper to disk relationship

However, I am just now starting to hear about sliding dropouts, so maybe Sheldon didn't consder them in writing his article.
yea that's what I was going for. I agree though, with these sliding dropouts (I had no idea what they were until after I'd posted here) it looks like it would be fine.
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Old 10-26-06, 10:18 AM   #11
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WOOHOO! sliding dropouts = derailleur-less bikes - about time too

for another thread about sliding dropouts. Cannondale (and others?) use an eccentric bottom bracket (like a tandem). This strikes me as a particularly good solution to the problem.
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Old 10-26-06, 02:41 PM   #12
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Installing the Rohloff on a stock frame like the LHT is not such a good idea. The Rohloff does better with horizontal dropouts, particularly those made by Rohloff that also get you out of having to use a torque arm fixture. As the LHT is not made for disc brakes, you would need to have the frame modified by a frame builder by welding on a disc brake tab to the left rear seatstay and the front fork. If you are going to that much trouble--with the respray work after-- then you might as well have both rear dropouts changed as well. And since the Rohloff requires a double cable control that goes to the left side rear hub axle control box, you may want to have cable guides brazed onto the frame downtube, bottom bracket shell and left chainstay to keep the cables neat and out of the way.

As you are then talking about that substantial a modification and a repainting to a frame that costs $400 to begin with, you might want to rethink having a custom frame done from the outset. When you are thinking of spending $1100 on a top-of-the-line Speedhub, that is a reasonable consideration. Then at least you could get personalized measurements, choice of tubing and choice of paint.

I have a custom tourer with a Rohloff Speedhub. If you are going to buy this expensive component, then having a frame that optimizes it only makes sense.

If you want to see examples of custom Rohloff applications, see the A.N.T. bicycle website (Mike Flanigan's www.antbikemike.com) and Tom Oswald's website gallery at www.oswaldcycles.com .

Last edited by CHenry; 10-26-06 at 03:00 PM.
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Old 11-07-06, 01:20 AM   #13
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Thorn makes production Rohloff frames.

http://www.sjscycles.co.uk/lkid/18/a...nCyclesLtd.htm
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Old 11-07-06, 07:06 PM   #14
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you could always use a surly crosscheck frame. it has disk mounts and and semi-horizontal dropouts that would work great.

edit: whoops nevermind, no disk mounts here

Last edited by zephyr16; 11-07-06 at 07:54 PM.
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Old 11-08-06, 09:33 AM   #15
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Quote:
Originally Posted by CHenry

I have a custom tourer with a Rohloff Speedhub. If you are going to buy this expensive component, then having a frame that optimizes it only makes sense.

If you want to see examples of custom Rohloff applications, see the A.N.T. bicycle website (Mike Flanigan's www.antbikemike.com) and Tom Oswald's website gallery at www.oswaldcycles.com .

Thanks--thats pretty much what I told the guy who wants it.

http://www.cheekymonkey.com.au/Bikes.htm look at Jans surly with rohloff. Looks pretty sweet.
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Old 11-08-06, 12:14 PM   #16
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You can get disk brake tabs welded/brazed onto pretty much any frame for less than $100. It's substatially less expensive/involved than replacing dropouts. I've done both.
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Old 11-08-06, 12:31 PM   #17
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Now if some company could make a dual-suspension XC MTB with a Rohloff hub in the US, I'll be happy...
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Old 03-29-07, 07:05 AM   #18
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Quote:
Originally Posted by GiantDave
Thanks--thats pretty much what I told the guy who wants it.

http://www.cheekymonkey.com.au/Bikes.htm look at Jans surly with rohloff. Looks pretty sweet.

I was going to post a link to cheekymoney...they have done a number of rohloff bike conversions, including a few LHTs! It looks as though all that is needed to put a rohloff hub on an LHT is a chain tensioner or something similar.....doesn't seem any more of a mess then having a full deraileur setup.
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Old 03-29-07, 07:08 AM   #19
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As far as dropouts are concerned, a simple solution to the vertical dropout would be an eccentric BB.

I have to agree that, if you're going to spend $1000 on a Rohloff, you might as well have a frame that's ideal for it.
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