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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 12-29-04, 10:51 AM   #1
POB/London
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Kona frame + SS + cantis = hassle!!

Hope you can help guys....

I am just finishing the assembly of my Kona Kiluea-framed despatch bike, which I will work on in London. It has had the dropouts changed (track), and now has a lovely Record Pista chainset, carbon seatpost, a pair of Spot s/speed wheels, Kore stem, cowhorn bars and Pace RC31 carbon forks.

Yummy - my ultimate city fixie. Ultra light, ultra tough and ultra simple.

...But I have a problem. I am using an XT v-brake on the front, with a cable widget to fix the travel issue. This was necessary because Dia-Compe bar-end reverse levers are fitted and I want decent stopping power. Because I will swap from fixed to s/spd once in a while, I need a back brake too.

I don't want any extra weight though, so I went for the Avid Shorty 4 canti brake (designed for road brake-pull ratios). All OK so far? Well the frame doesn't have a cable stop fitted, and the seat tube pinch bolt is at the front, so one of these won't do the trick:

http://www.nashbar.com/nashbar_photos/medium/NS-BCH.gif

What can I do?
Can you get a band-on stop for the top of the seat tube?

A cable stop fitted to the top-tube won't pull evenly enough for my straddle wire to set properly. Ideally I am looking for a little gadget or solution that I can get hold of here in the UK

Help!
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Old 12-29-04, 11:10 AM   #2
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I have seen seatpost clamps with integral cable stop...not much help, though, as I can't remember what website I saw them on. If your Kona clamp is not removeable, then I imagine you could shim the clamp w/stop (assuming you can find one) and put it on your seatpost.
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Old 12-29-04, 11:29 AM   #3
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I feel your pain. Take a look at my Il Pompino set up w/ canti's, it's set up for SS CX. I've found that running the Kool Stop Salmon pads provides ample stopping power for canti's. WAY better than the black pads.

Your Fixed Gear/SS Photos!

I've tried Diacompe 287v's w/ V's on another SS but really prefer canti's w/ aero brake levers.

You can try this but it wouldn't fit my seat tube.
http://www.store.yahoo.com/cyclocrossworld/coseco.html
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Old 12-29-04, 11:42 AM   #4
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Ditch the canti and get an Avid V-brake. Screw the weight, it's only a few grams.
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Old 12-29-04, 11:47 AM   #5
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Hey, POB, one of those stops you posted will do the trick - just mount it to a spare seatpost clamp that you then mount directly to the seatpost...a home-made version of what I referred to earlier and sorta' ghetto, but it will get you rolling with a rear brake.
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Old 12-29-04, 12:21 PM   #6
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Is the seat clamp removable or are the pinch bolts brazed-on?
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Old 12-29-04, 01:13 PM   #7
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Quote:
Originally Posted by BlastRadius
Is the seat clamp removable or are the pinch bolts brazed-on?
Wow - I really had my stupid head on tonight....

The seat clamp is removable, so I guess I can have the frame slot facing forwards, but the clamp bolt facing backwards. Then I can use one of the things I mentioned before.

However ...

A spanner is in the works. I remember seeing a roller on a bike. It was like a pulley (15mm diameter?) which sat on a band mounted to the seatpost. That means I could remove the rear top-tube cable stop, and have bare inner going all the way to this roller thing and then directly to the straddle wire. Very minimalist and cool.

Sorry for my terrible drawing, but this is what it looked like:
http://www.pm-04.com/device.jpg

Anyone know who makes / distributes these?
Seen any recently?

If I could find them, that would be the end of my problems, and tehn I could BRING ON THE RESPRAY.
Photos will be provided. At the moment I am thinking baby blue with orange decals and carbon forks.

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Old 12-29-04, 01:38 PM   #8
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Maybe a front cable hanger reversed?

Lbs stock several sizes, mounted on the stem for old mtbs.

If you can get a seattube collar that fits, the hanger portion would be easy to adapt\ build.

It may be >the idea of using the front hanger reversed =it will be to high =too much yoke.
Then you might try fashioning a longer cable stop arm to mount on the collar.

http://www.bikeparts.com/ProductInfo...hanger751.html
http://www.bikeparts.com/ProductInfo...hanger836.html

Last edited by jeff williams; 12-29-04 at 01:43 PM.
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Old 12-29-04, 01:52 PM   #9
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Maybe you can build one of those spanners from a travel agent? Don't know exactly how it would mount though.
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Old 12-29-04, 01:58 PM   #10
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Quote:
Originally Posted by POB/London
Anyone know who makes / distributes these?
Seen any recently?
Try www.aebike.com or www.thethirdhand.com

My wife's hybrid has a setup like that since it's a step-thru frame.
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Old 12-29-04, 02:07 PM   #11
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Perhaps you could adapt one of these... http://www.store.yahoo.com/cyclocros...clamwitpu.html
I'd just go with one of the seat collar hangers. You don't want to mess with your brakes everytime you do something with your seatpost.

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Old 12-29-04, 02:26 PM   #12
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Maybe you could just get away with a front brake?

http://www.sheldonbrown.com/brakturn.html
http://draco.acs.uci.edu/rbfaq/FAQ/9.17.html

(I use my back brake all the time... it just seems like you could get away without one)
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Old 12-29-04, 03:10 PM   #13
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This guy did something clever.

You could also use one of those older MTB stems that allowed cable routing thru the stem itself. Although most of those are probably 1", not 1 1/8".

http://www.****shifter.com/pictures/...id=67&first=36
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Old 12-29-04, 03:15 PM   #14
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Quote:
Originally Posted by thechrisproject
Maybe you could just get away with a front brake?

http://www.sheldonbrown.com/brakturn.html
http://draco.acs.uci.edu/rbfaq/FAQ/9.17.html

(I use my back brake all the time... it just seems like you could get away without one)

On my SS road/commuter I only have a front brake. It works fine, and I've never had any problems.
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Old 12-29-04, 03:17 PM   #15
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Quote:
Originally Posted by oldskoolboarder
This guy did something clever.

You could also use one of those older MTB stems that allowed cable routing thru the stem itself. Although most of those are probably 1", not 1 1/8".

http://www.****shifter.com/pictures/...id=67&first=36
Hmm, thats a very innovative idea! (filing away in brain for future use)
I wonder how he got the bar end around the tube.
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Old 01-05-05, 09:37 AM   #16
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Hey guys.

Thanks for all thesuggestions and replies. I have found a solution from the world of cyclo-X. Lots of compact c-X frames do not have an arrangement for running cantis at the rear (the curse of the v-brake, influencing the frame makers).

This is the fix:


Works perfectly, and would be a lot lighter than the setup on the il pompino earlier. The other good thing is that there is NO outer cable further back from the front toptube stop, so hardly any stiction. This is good for me as I am running the Profile bar-end levers which do not have their own return spring.

At the moment I am much preferring the feel of the old-skool canti than the V on the front. More pics of the complete bike here:

http://www.pm-04.com/gallery/bicycles

Comments / suggestions more than welcome. Only change so far has been 42x17 increased to 44x17 for more cruisin' speed in London traffic. I am also investigating a respray and track ends, and the possibility of a flip-flop rear wheel with a Goldtec hub. I would build a new front wheel with the same rim, but with a lovely old Dura-Ace 28 hole road hub I have spare. Bike will be "Il Pompino" blue with new Kona stickers in orange under the lacquer.

I think I'll be making some serious money on this beast - it's SO fast, 18.5lbs as you see it in the pics. And the Pace forks mean I can practically steer it with mind control alone, yet it is still stable.

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Old 01-05-05, 09:38 AM   #17
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Old 01-05-05, 11:49 AM   #18
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Interesting. Do you mind taking a pic from the other side so we can see the cable holder? Maybe I'm dense, but I can't see/understand what you did.

18.5 lbs? Impressive.
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Old 01-05-05, 01:05 PM   #19
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It looks like an internally geared hub cable pulley, like so: http://retroraleighs.com/clubman-koh...composite.html
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