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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 04-18-12, 01:45 AM   #1
RJMurphy
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Conversion: Downtube Shifter Removal?

So, I have an old "Bianchi" (not sure even if that's what it is....says "Columbus" and is Tange-2, etc.) that I am taking a grinder to and removing all of the loop holds and metal dodads and sand blasting to prime and repaint. First fixie conversion and I got the bike for $10. Super light and will probably look nice if I do it right. Happy with the frame. Esp for $10. But, problem, I can figure out how to get these downtube shifter attachments off?? Any ideas? I mean there's no way that the light and dark metal parts are one (they rattle) so there has to be some way they got them on there. How do I get them off w/ as little grinder as possible?? Pictures attached.
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Old 04-18-12, 01:51 AM   #2
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Please don't wreck a good road frame with your grinder.
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Old 04-18-12, 02:01 AM   #3
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Shifter boss covers...

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Old 04-18-12, 02:25 AM   #4
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Oh I don't want to if I can afford it. At least not the downtube shifters. I'd keep them if I could. Which it looks like with the comment below, I can. But I don't even know what the frame is. I even tried Bianchi Girl to ID it, and no go. No one has anything even close (Bianchi wise). And I already have a good road frame that I actually know what it is. And my size. So, meh. We'll see what happens.
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Old 04-18-12, 04:17 AM   #5
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I wouldn't spend that much time or money on a frame with that geometry and stamped dropouts. Just buy a new rear wheel.

http://www.bikeforums.net/showthread...ianchi-Help-ID
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Old 04-18-12, 08:37 AM   #6
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From the looks of the bike, looks like the only time you'd spend on the bike is riding it ? If it's the same bike in the other thread, I'll give you $ 10 for it just to save the frame from the grinder.
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Old 04-18-12, 07:01 PM   #7
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I wouldn't spend that much time or money on a frame with that geometry and stamped dropouts. Just buy a new rear wheel.

http://www.bikeforums.net/showthread...ianchi-Help-ID

The work on it is for entertainment and to get the rust and bad paint off. I also have all the equipment to do what I want (save the new paint). Just for fun really. But, I would like to understand your geometry comment. What geometry would you feel would be a better choice for a fixed or single speed?? And why? A link to a post is good enough of an answer. I don't expect you to type out EVERYTHING if you don't want. Thank you sir!
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Old 04-18-12, 08:24 PM   #8
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If I understand you correctly, you're trying to remove some of the shifter bits left behind when you removed the shifters. This can be done with a small screwdriver used as a pry bar.

The grinder, BTW, is a bad idea, as even the heavy tubing on that frame is still fairly thin - wall thickness in the neighborhood of one millimeter. It's easy to make a pretty significant nick with an angle grinder. At the very least, I'd save the grinder for the "rough" part of the job and finish with hand files.
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Old 04-18-12, 08:27 PM   #9
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Shifter boss covers...

They're less than $22 shipped and solve the problem. Don't be cruel.
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Old 04-18-12, 10:17 PM   #10
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If I understand you correctly, you're trying to remove some of the shifter bits left behind when you removed the shifters. This can be done with a small screwdriver used as a pry bar.
Good way to trash your frame.
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Old 04-18-12, 10:29 PM   #11
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Good way to trash your frame.
I think he's referring to the spacer-things that are crescent-shaped to butt up against the downtube. Could be wrong.
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Old 04-19-12, 01:27 AM   #12
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They're less than $22 shipped and solve the problem. Don't be cruel.

That's the way to go. I agree. So, I will probably do that to save it if I ever want to make it multi-speed again.
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Old 04-19-12, 07:32 PM   #13
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Good way to trash your frame.
Yeah, I've only been doing it that way for thirty years, so doubtless you've got it figured out better than I do.
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Old 04-19-12, 08:08 PM   #14
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Just do it!

There's "builders" and there's "guys who just want to ride". The two groups tend not to understand one another.
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Old 04-19-12, 08:16 PM   #15
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Yeah, I've only been doing it that way for thirty years, so doubtless you've got it figured out better than I do.

Jesus man, how's menopause treating you? You don't have to be a dick about being misunderstood by some kid.
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Old 04-19-12, 08:59 PM   #16
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Yeah, I've only been doing it that way for thirty years, so doubtless you've got it figured out better than I do.
Just build motorcycles (and some bikes) do some welding and other metalwork and know that prying off a braze-on can mar/weaken a tube, seen the underlying tube come off along with the braze on... (nothing beats a hole in your tube) It is like trying to put out a forest fire with a fork. I'd personally leave it... But if it "had" to come off, I'd hit it with heat or cut it off, hit it with a dremel and then hand file it... I'm assumin that the OP doesn't have much experience and would "heavy-hand" it.
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Old 04-19-12, 09:32 PM   #17
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Read it again. I'm not telling him to pry off the braze-on. I'm telling him to pry off the shifter parts that were left behind when he removed the shifters.
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Old 04-19-12, 09:40 PM   #18
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Jesus man, how's menopause treating you? You don't have to be a dick about being misunderstood by some kid.
But you have to be a dick about me being a dick? I look forward to you being a grumpy middle-aged man so I can make fun of you.
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Old 04-19-12, 09:54 PM   #19
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Already am.

Bring it on.
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Old 04-20-12, 05:26 PM   #20
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Ha ha, you're a grumpy middle-aged man.

Sorry, that's all I've got.
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