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Out of ideas: chainline

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Out of ideas: chainline

Old 05-04-13, 01:56 PM
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Out of ideas: chainline

Hello, I’m stuck on chainline at my first fixie build

Pictures gallery - https://www.dropbox.com/sh/e2kxkyhe533r33m/ds9KwLFj6e

Measurements with a ruler: front ~45mm / rear 41mm
Bottom bracket: campagnolo 36x24f cant remember axis size, but I really made there all I could before reaching frame. (see pics)
Rear Hub: Sturmey-Archer Track hub 120-135mm
Frame rear dropouts spacing: 120mm

- Front is as close as possible
- Cog is flipped to right side (normal position)

See pics how it looks, chain sits tight, thanks to brutal chainring teeth, but i can hear the chain and it's quacks sometimes which makes me nuts.

Any suggestions?
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Old 05-04-13, 02:02 PM
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is your rear wheel centered? looks like your wheel is off axis.
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Old 05-04-13, 02:04 PM
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Originally Posted by Sturmer
Hello, I’m stuck on chainline at my first fixie build

Pictures gallery - https://www.dropbox.com/sh/e2kxkyhe533r33m/ds9KwLFj6e

Measurements with a ruler: front ~45mm / rear 41mm
Bottom bracket: campagnolo 36x24f cant remember axis size, but I really made there all I could before reaching frame. (see pics)
Rear Hub: Sturmey-Archer Track hub 120-135mm
Frame rear dropouts spacing: 120mm

- Front is as close as possible
- Cog is flipped to right side (normal position)

See pics how it looks, chain sits tight, thanks to brutal chainring teeth, but i can hear the chain and it's quacks sometimes which makes me nuts.

Any suggestions?
Is your chain too tight? Perfect chainline is not absolutely crucial; my fixed is off by a few mm and it's quiet. Mixing 3/32 and 1/8 components, low quality parts, and lack of grease will also make noise.
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Old 05-04-13, 02:05 PM
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I don't think that frame is 120mm rear spacing, or at least it wasn't when it was made. If it's been modded, that could be your problem.
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Old 05-04-13, 02:41 PM
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Originally Posted by cruiserhead
is your rear wheel centered? looks like your wheel is off axis.
Well yeah its centered, since hub is symmetric, where you managed to see that kind of a problem?

Originally Posted by Training.Wheels
Is your chain too tight? Perfect chainline is not absolutely crucial; my fixed is off by a few mm and it's quiet. Mixing 3/32 and 1/8 components, low quality parts, and lack of grease will also make noise.
All 1/8, not too tight like a sting, i think aout 8-12mm variance

Originally Posted by seau grateau
I don't think that frame is 120mm rear spacing, or at least it wasn't when it was made. If it's been modded, that could be your problem.
You sir are wrong, frame is 120 since was created, and all it's bros and sis are the same.

Can push in 3-4mm spacers w/o beding anything.
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Old 05-04-13, 02:47 PM
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Originally Posted by Sturmer


You sir are wrong, frame is 120 since was created, and all it's bros and sis are the same.
I doubt it.
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Old 05-04-13, 02:49 PM
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^^^ Exactly what I was thinking, braze on FD and columbus tubing sure points to 126mm.

is your frame straight? Is you wheel dished properly?
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Old 05-04-13, 03:06 PM
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Originally Posted by IthaDan
is your frame straight?
How to check that?
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Old 05-04-13, 03:11 PM
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google
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Old 05-04-13, 03:23 PM
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Ok, frame bend
Should i put 126mm wheel?
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Old 05-04-13, 03:36 PM
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I thought your frame was built spaced at 120...

notknowingwhatyouretalkingabout.gif
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Old 05-04-13, 03:54 PM
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Frame is Concorde Colombo 1988
3 main tubes are columbus AELLE, dropouts Ultech
front frame badge - vertical word "concorde" not casual Bird logo.
Is it possible that older frames (pre-90s) were 120?

Meanwhile, how about adding spacers 1 + 5 mm on non-drive side and then re-center wheel at workshop?
It loos like that will put me 126/2-18=45mm almost same as chainrigs

feedback?
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Old 05-04-13, 04:29 PM
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Take it to a shop and don't say a word. The attitude you've already shown in this thread isn't going to get you very far.

The repair is easy, but the tools are expensive and you'll never need them again. Just pay a shop and wash your hands.
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Old 05-04-13, 09:50 PM
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how about adding spacers 1 + 5 mm on non-drive side and then re-center wheel at workshop?
That theoretically should do the trick. But I have a question: I have heard doing this (spacer & redish) would put unequal stress on the left and right side of the hub, which is anything but good for the hub and etc?
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Old 05-04-13, 10:12 PM
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Pfft. If a fatbike can run a hub off center, there's no issue there.

There is, however a problem when you flip your flop or want to swap in a new wheel.

Seriously, a frame alignment should be like $20 and half an hour at any shop worth a ****.
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Old 05-05-13, 02:45 AM
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Originally Posted by IthaDan
Seriously, a frame alignment should be like $20 and half an hour at any shop worth a ****.
Well, problem is most workshops in my county have only hammer for that kind of work "Just spray some paint of similar color and you good to go".
it would be more useful if you can tell whats wrong, how to fix that and which tools should be at works.

And fatbike commonly uses hub with a cassette, which is designed to be off-centered by default. I think stillcovale was talking about centered trackhubs, like mine flip-flop.

Last edited by Sturmer; 05-05-13 at 02:53 AM.
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Old 05-05-13, 05:06 AM
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Is english your first language?

Edit: fine, google up "frame alignment" or "frame coldset"- saint Sheldon has a great article. The key is to get the dropouts parallel once you've set the stays.
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Last edited by IthaDan; 05-05-13 at 06:26 AM.
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Old 05-05-13, 08:34 AM
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Another great thread. Kudos to all involved.
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Old 05-05-13, 12:02 PM
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Originally Posted by IthaDan
is your frame straight?
Originally Posted by Sturmer
How to check that?
String test: https://sheldonbrown.com/frame-spacing.html
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Old 05-05-13, 12:11 PM
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Originally Posted by IthaDan
Is english your first language?
obviously no, I am from Libya.

Whats wrong with you people? Why so rude and mean?
I provided all information i could, was polite, but receiving negative attitude and "go google".

Something wrong with a frame, fine, thanks for pointing that out. But none of the comments yet solved the issue with a chainline.
Even with perfect and brand new frame its still 46 / 41 mm with a 5mm gap
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Old 05-05-13, 12:14 PM
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Originally Posted by JohnDThompson
That's helpful, Thanks!
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Old 05-05-13, 12:27 PM
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Originally Posted by Sturmer
Whats wrong with you people? Why so rude and mean?
We're American.

Originally Posted by Sturmer
I provided all information i could, was polite, but receiving negative attitude and "go google".
It may be because you came in here saying know-it-all things like like this (even though you are wrong):

Originally Posted by Sturmer
You sir are wrong, frame is 120 since was created, and all it's bros and sis are the same.

Last edited by Scrodzilla; 05-05-13 at 12:30 PM.
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Old 05-05-13, 08:30 PM
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Exactly.
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Old 05-05-13, 08:39 PM
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I think he was trying to be polite. English is hard man.
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Old 05-05-13, 08:44 PM
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Didn't know he was libyan until he offered. Good intentions or not, he came across like the kind of punk noobie we see all too often asking about "fixies" here in BFSSFG.
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