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Tandem triple right rear arm ok to use ?



 
 
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  #1  
Old February 12th 18, 04:09 AM posted to rec.bicycles.tech
Doug Landau
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Default Tandem triple right rear arm ok to use ?

Is there any reason this thing won't work on my single?

https://www.ebay.com/itm/NEW-Sugino-...wAAOSw9KhaA4EP

Thanks
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  #2  
Old February 12th 18, 04:10 AM posted to rec.bicycles.tech
Doug Landau
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Posts: 1,359
Default Tandem triple right rear arm ok to use ?

On Sunday, February 11, 2018 at 8:09:37 PM UTC-8, Doug Landau wrote:
Is there any reason this thing won't work on my single?

https://www.ebay.com/itm/NEW-Sugino-...wAAOSw9KhaA4EP

Thanks


https://tinyurl.com/y77tnk4t
  #3  
Old February 12th 18, 02:00 PM posted to rec.bicycles.tech
AMuzi
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Default Tandem triple right rear arm ok to use ?

On 2/11/2018 10:09 PM, Doug Landau wrote:
Is there any reason this thing won't work on my single?

https://www.ebay.com/itm/NEW-Sugino-...wAAOSw9KhaA4EP



Assuming you have a compatible BB, 170mm LH arm, 110mm
chainring and bolt set already, yes you can cut away the
inner ring seats:
http://www.yellowjersey.org/crankcut.html

We used to do that back in the years when compact doubles
were not offered.

However if you don't have the other bits or if you can't
trim the crank casting it's not especially cheap and a
complete crank set w/BB may well be better value.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


  #4  
Old February 12th 18, 03:25 PM posted to rec.bicycles.tech
SMS
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Posts: 8,323
Default Tandem triple right rear arm ok to use ?

On 2/12/2018 6:00 AM, AMuzi wrote:
On 2/11/2018 10:09 PM, Doug Landau wrote:
Is there any reason this thing won't work on my single?

https://www.ebay.com/itm/NEW-Sugino-...wAAOSw9KhaA4EP



Assuming you have a compatible BB, 170mm LH arm, 110mm chainring and
bolt set already, yes you can cut away the inner ring seats:
http://www.yellowjersey.org/crankcut.html

We used to do that back in the years when compact doubles were not offered.

However if you don't have the other bits or if you can't trim the crank
casting it's not especially cheap and a complete crank set w/BB may well
be better value.


I think he's asking if there's any reason it won't work on a non-tandem,
not whether or not he can convert it to a single chain-ring crank.

  #5  
Old February 13th 18, 01:31 AM posted to rec.bicycles.tech
[email protected]
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Default Tandem triple right rear arm ok to use ?

I have a question. Is there anything unique or different about the drive crankset on a tandem? Compared to a single bike. I realize the non drive side arm has the extra chainring on it to mate up with the captain's crank so both cranks turn in unison. But for the drive side rear crank arm, is there anything that specifically makes it a tandem crank instead of just being a drive crank suitable for any bike?
  #6  
Old February 13th 18, 01:34 AM posted to rec.bicycles.tech
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Default Tandem triple right rear arm ok to use ?

On Monday, February 12, 2018 at 8:00:58 AM UTC-6, AMuzi wrote:

Assuming you have a compatible BB, 170mm LH arm, 110mm
chainring and bolt set already, yes you can cut away the
inner ring seats:
http://www.yellowjersey.org/crankcut.html

We used to do that back in the years when compact doubles
were not offered.

--
Andrew Muzi


As I am sure you are well aware, a long time ago, the inner ring had separate spacers to get the inner ring out in air. Now days the rage is to mold in the spacers in metal directly into the crank arms. No separate spacers.
  #8  
Old February 13th 18, 02:23 AM posted to rec.bicycles.tech
AMuzi
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Posts: 9,723
Default Tandem triple right rear arm ok to use ?

On 2/12/2018 7:34 PM, wrote:
On Monday, February 12, 2018 at 8:00:58 AM UTC-6, AMuzi wrote:

Assuming you have a compatible BB, 170mm LH arm, 110mm
chainring and bolt set already, yes you can cut away the
inner ring seats:
http://www.yellowjersey.org/crankcut.html

We used to do that back in the years when compact doubles
were not offered.

--
Andrew Muzi


As I am sure you are well aware, a long time ago, the inner ring had separate spacers to get the inner ring out in air. Now days the rage is to mold in the spacers in metal directly into the crank arms. No separate spacers.


Which is superior and good engineering for that overly
torqued inner ring hardware.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


  #9  
Old February 13th 18, 07:37 PM posted to rec.bicycles.tech
Emanuel Berg[_2_]
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Default Tandem triple right rear arm ok to use ?

AMuzi wrote:

Which is superior and good engineering for
that overly torqued inner ring hardware.


What is the superior way to keep the chain
straight on tandem bikes?

I once saw a small chainwheel, slightly bigger
than an RD pulley wheel, in a vertical track,
so it could be adjusted up/down to interfere
with the chain.

This made sense to me, maybe because
I understood it, but I have since then seen
modern tandems and they don't have it.

--
underground experts united
http://user.it.uu.se/~embe8573
  #10  
Old February 13th 18, 09:23 PM posted to rec.bicycles.tech
AMuzi
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Posts: 9,723
Default Tandem triple right rear arm ok to use ?

On 2/13/2018 1:37 PM, Emanuel Berg wrote:
AMuzi wrote:

Which is superior and good engineering for
that overly torqued inner ring hardware.


What is the superior way to keep the chain
straight on tandem bikes?

I once saw a small chainwheel, slightly bigger
than an RD pulley wheel, in a vertical track,
so it could be adjusted up/down to interfere
with the chain.

This made sense to me, maybe because
I understood it, but I have since then seen
modern tandems and they don't have it.


Sure, many drive formats.

What I meant is that bolts should be in shear to the extent
possible. A stack of spacers under a bolt leads to bent bolts.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


 




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