Odd Duck Opinion Andrew?
 

https://sfbay.craigslist.org/pen/bop...169949141.html

Odd Duck Opinion Andrew?
 

On 8/3/2020 9:55 AM, wrote:
https://sfbay.craigslist.org/pen/bop...169949141.html


No complaints. People argue about internal gearboxes (as
with anything else) but these work and that's cheap.

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

Odd Duck Opinion Andrew?
 

On Monday, August 3, 2020 at 2:22:36 PM UTC-7, AMuzi wrote:
On 8/3/2020 9:55 AM, wrote:
https://sfbay.craigslist.org/pen/bop...169949141.html


No complaints. People argue about internal gearboxes (as
with anything else) but these work and that's cheap.

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

Since it is an 8 speed Di2, it would seem to me that a 2 speed crank would really make a nice reliable and good shifting setup.

Odd Duck Opinion Andrew?
 

On 8/4/2020 10:08 AM, wrote:
On Monday, August 3, 2020 at 2:22:36 PM UTC-7, AMuzi wrote:
On 8/3/2020 9:55 AM, wrote:
https://sfbay.craigslist.org/pen/bop...169949141.html


No complaints. People argue about internal gearboxes (as
with anything else) but these work and that's cheap.


Since it is an 8 speed Di2, it would seem to me that a 2 speed crank would really make a nice reliable and good shifting setup.

If you have a frame with horizontal ends, probably. With
verticals you'll have to run a derailleur or a tensioner so
you lose the clean aesthetic and simplicity.

http://www.yellowjersey.org/photosfr...t/sky531aw.jpg



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

Odd Duck Opinion Andrew?
 

On Tuesday, August 4, 2020 at 8:34:32 AM UTC-7, AMuzi wrote:
On 8/4/2020 10:08 AM, wrote:
On Monday, August 3, 2020 at 2:22:36 PM UTC-7, AMuzi wrote:
On 8/3/2020 9:55 AM, wrote:
https://sfbay.craigslist.org/pen/bop...169949141.html


No complaints. People argue about internal gearboxes (as
with anything else) but these work and that's cheap.


Since it is an 8 speed Di2, it would seem to me that a 2 speed crank would really make a nice reliable and good shifting setup.

If you have a frame with horizontal ends, probably. With
verticals you'll have to run a derailleur or a tensioner so
you lose the clean aesthetic and simplicity.

http://www.yellowjersey.org/photosfr...t/sky531aw.jpg

What about using something like this? Cheap, easy and effective. Plenty of room for a compact crank. https://www.ebay.com/itm/MTB-Bicycle...075ff8f9e3d1ab

Odd Duck Opinion Andrew?
 

On 8/4/2020 10:53 AM, wrote:
On Tuesday, August 4, 2020 at 8:34:32 AM UTC-7, AMuzi wrote:
On 8/4/2020 10:08 AM, wrote:
On Monday, August 3, 2020 at 2:22:36 PM UTC-7, AMuzi wrote:
On 8/3/2020 9:55 AM, wrote:
https://sfbay.craigslist.org/pen/bop...169949141.html


No complaints. People argue about internal gearboxes (as
with anything else) but these work and that's cheap.


Since it is an 8 speed Di2, it would seem to me that a 2 speed crank would really make a nice reliable and good shifting setup.

If you have a frame with horizontal ends, probably. With
verticals you'll have to run a derailleur or a tensioner so
you lose the clean aesthetic and simplicity.

http://www.yellowjersey.org/photosfr...t/sky531aw.jpg

What about using something like this? Cheap, easy and effective. Plenty of room for a compact crank. https://www.ebay.com/itm/MTB-Bicycle...VwlwkQGDoBUZRR
URvIKZdykGk12VZ%2BpTlIz5sLwtksUDjM4sIpJJHJHsB%2F6V nUX26pHHcMPLivN5X3pwmIXHIWdTAAVWyppQRD2%2FPlPM24Gh 4E7HuS%2FJEqJKXCaPGlBHBaWbCs1GEFjcFc212pIzRA5KhecU dOquBAY%2Fv0MwJVpE0w8fJSSZwx9Ubw%3D%3D&checksum=20 29301039880dbb8bbcc3924c53ac075ff8f9e3d1ab


We agree.
That does exactly the same job in the same way as a used
Tourney derailleur with the stop screw turned in.

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

Odd Duck Opinion Andrew?
 

On 8/4/2020 9:12 AM, AMuzi wrote:

snip

https://www.ebay.com/itm/202930103988



We agree.
That does exactly the same job in the same way as a used Tourney
derailleur with the stop screw turned in.

If you're putting that device on a bicycle with double or triple front
crank then it makes some sense, but for single front crank why would you
not just shorten the chain?

That description is quite amusing: "This single speed converter is very
suitable for the bicycle that suits for mountainous terrain" and
"Suitable for people who like cycling."

Odd Duck Opinion Andrew?
 

On Tuesday, August 4, 2020 at 11:06:48 AM UTC-7, sms wrote:
On 8/4/2020 9:12 AM, AMuzi wrote:

snip

https://www.ebay.com/itm/202930103988



We agree.
That does exactly the same job in the same way as a used Tourney
derailleur with the stop screw turned in.
If you're putting that device on a bicycle with double or triple front
crank then it makes some sense, but for single front crank why would you
not just shorten the chain?

That description is quite amusing: "This single speed converter is very
suitable for the bicycle that suits for mountainous terrain" and
"Suitable for people who like cycling."
If you have vertical drop-outs you invariably have a slack chain that can throw the chain off of the chain ring. So whether you have one, two or three rings you're stuck using a chain tensioner of some sort. Andrew probably has an entire junkbox full of useful old derailleurs that would take care of the problem but since I've been cleaning everything out I'm stuck purchasing new.

Odd Duck Opinion Andrew?
 

On Wednesday, August 5, 2020 at 12:37:10 AM UTC+1, Tom Kunich wrote:
On Tuesday, August 4, 2020 at 11:06:48 AM UTC-7, sms wrote:
On 8/4/2020 9:12 AM, AMuzi wrote:

snip

https://www.ebay.com/itm/202930103988



We agree.
That does exactly the same job in the same way as a used Tourney
derailleur with the stop screw turned in.
If you're putting that device on a bicycle with double or triple front
crank then it makes some sense, but for single front crank why would you
not just shorten the chain?

That description is quite amusing: "This single speed converter is very
suitable for the bicycle that suits for mountainous terrain" and
"Suitable for people who like cycling."
If you have vertical drop-outs you invariably have a slack chain that can throw the chain off of the chain ring. So whether you have one, two or three rings you're stuck using a chain tensioner of some sort. Andrew probably has an entire junkbox full of useful old derailleurs that would take care of the problem but since I've been cleaning everything out I'm stuck purchasing new.

All my current bikes have horizontal sliding frame ends. But they can be quite as limiting as vertical dropouts. For instance, what's commonly known as track ends cannot be bolted up tightly enough to work with a hub or bottom bracket gearbox with force multiplication greater than say the Shimano Nexus HGB, and certainly not with the more puissant centre motors.

Rohloff's in-house design of dropout, blueprints available free of charge, oddly enough is a dropout, vertical. But it sits on a machined aluminium piece which slides in closed slots on the frame ends, and is confined to the slots and thus to horizontal sliding by a tongue on the actual axle hanger. The non-drive side of the axle hanger has an extra long axle slot to hold a stud about half an inch by a quarter which is on the gearbox itself and this does duty as the torque reaction arm. It is probably just as well the Rohloff likes a slack chain... A tightly packed installation, though, when you come to a touring bike. Close up photos on the eighth page of this PDF: http://coolmainpress.com/AndreJute'sUtopiaKranich.pdf

Andre Jute
Pathfinder