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Tandem triple right rear arm ok to use ?



 
 
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  #11  
Old February 14th 18, 01:49 AM posted to rec.bicycles.tech
SMS
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Posts: 8,191
Default Tandem triple right rear arm ok to use ?

On 2/13/2018 11:37 AM, 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.


Low-end tandems still use this.
http://www.ritzcarlton.com/en/hotels/japan/kyoto/area-activities/activities/guest-activities/kyoto-tandem-bike-ride
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  #12  
Old February 16th 18, 03:22 AM posted to rec.bicycles.tech
Doug Landau
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Default Tandem triple right rear arm ok to use ?

On Monday, February 12, 2018 at 7:25:58 AM UTC-8, sms wrote:
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.


Yes. I mean can I just install the thing on my fuji s12-s, which is already a triple (an oldskool one with a single set of 110bcd chainring bolts and so a 34T low), and be happy. Mine is 170 and all three rings are on 110, so all I would need to get is a granny ring.

So what would be the difference between the front and rear right sides?

Thanks
  #13  
Old February 16th 18, 01:48 PM posted to rec.bicycles.tech
AMuzi
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Posts: 9,386
Default Tandem triple right rear arm ok to use ?

On 2/15/2018 9:22 PM, Doug Landau wrote:
On Monday, February 12, 2018 at 7:25:58 AM UTC-8, sms wrote:
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.


Yes. I mean can I just install the thing on my fuji s12-s, which is already a triple (an oldskool one with a single set of 110bcd chainring bolts and so a 34T low), and be happy. Mine is 170 and all three rings are on 110, so all I would need to get is a granny ring.

So what would be the difference between the front and rear right sides?


http://www.yellowjersey.org/photosfr...t/santa13a.jpg

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


 




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