Retrobike Forum Index

It is currently Sun Oct 25, 2020 12:17 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 13 posts ]  Go to page 1, 2  Next
Author Message
PostPosted: Thu Oct 01, 2020 1:16 pm 
Retro Guru
User avatar

Joined: Mon Mar 02, 2009 4:22 pm
Posts: 1795
Is any kind of indexing basically out of the question with a drillium Huret Jubilee rear derailleur? I think I've ascertained that the cable pull is different to Shimano and Campag - much smaller - but I can't find out by how much. Does anyone know any dodges like using a 7-, 8-, 9- or 10-speed shifter to index close enough to a freewheel with fewer speeds, e.g. use 6 clicks of a 9-speed Shimano shifter and it'll index with a 6-speed block?

Don't know what the cable pull is on a Huret set, but posting these ones here for reference: http://blog.artscyclery.com/science-beh ... atibility/


Top
 Profile  
 
PostPosted: Thu Oct 01, 2020 1:55 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 10251
Location: New Forest, UK
It's from long before indexing.
Frankly indexing is pretty much a waste of time on anything up to 7 speed - there is enough leeway for it to shift a single gear, with a little nudge maybe afterwards to tune things. I run bar-ends off road on a drop bar MTB and have switched the indexing off.


Top
 Profile  
 
PostPosted: Thu Oct 01, 2020 3:27 pm 
Retro Guru
User avatar

Joined: Mon Mar 02, 2009 4:22 pm
Posts: 1795
hamster wrote:
Frankly indexing is pretty much a waste of time on anything up to 7 speed


See, I don't agree with that. I commuted and raced with indexed 6-speed downtube shifters for years and I found it amazing compared to friction. It's just one less thing you need to think about when you're trying to shift, pedal, grab for a brake, avoid a pot hole and watch out what the cars in front and next to you are doing all at the same time. Reach down / click / done.


Top
 Profile  
 
PostPosted: Thu Oct 01, 2020 4:03 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 10251
Location: New Forest, UK
Fair enough, different strokes for different folks. The amount of gear lever travel for 7 speed is so HUGE that it never seems to matter to me.


Top
 Profile  
 
PostPosted: Thu Oct 01, 2020 4:50 pm 
Old School Grand Master
User avatar

Joined: Fri Oct 14, 2011 8:41 pm
Posts: 9993
Location: Cumbria
I guess its a matter of trying some out ? the other thing is that if the set up is not linear (how the mech moves) then the travel of the mech will differ for each click.


Top
 Profile  
 
 Post subject: Re:
PostPosted: Thu Oct 01, 2020 10:37 pm 
Retro Guru

Joined: Wed Dec 10, 2008 9:19 am
Posts: 2711
Indexing at any speed is helpful, useful and promotes better use of gears.
These gears are in the pre-indexing era, but you may find something that will work.
The downside is you may have try every indexed lever ever made to drop on one combination that will work. Not only will you have to acquire and fit all those levers, but you'll have to cable them up and let them bed in before you can draw a conclusion. Then add in possible hubbub conversions and you have a lifelong project


Top
 Profile  
 
 Post subject: Re:
PostPosted: Fri Oct 02, 2020 5:39 am 
Retro Guru

Joined: Sun Jun 10, 2012 9:49 am
Posts: 337
Location: Hampshire
Remember seeing this on readers bikes maybe a year ago or more but I can find the original post but remember that the setup worked. :D


Attachments:
22221932056_d211d7ab86_b.jpg
22221932056_d211d7ab86_b.jpg [ 260.2 KiB | Viewed 225 times ]
Top
 Profile  
 
 Post subject: Re: Re:
PostPosted: Fri Oct 02, 2020 9:57 am 
Retro Guru
User avatar

Joined: Mon Mar 02, 2009 4:22 pm
Posts: 1795
vcballbat wrote:
Remember seeing this on readers bikes maybe a year ago or more but I can find the original post but remember that the setup worked. :D


Awesome, found it :cool:

viewtopic.php?f=23&t=349836

Ok so that looks like SRAM 10-speed indexes to 9 cogs of a Shimano 11-speed. 9 cogs of an 11-speed is about the same width of a 7-speed so that makes sense regarding the derailleur limit. From that, I can probably work out the original cable pull and derailleur ratio, since I know what the SRAM cable pull is and the 11-speed spacing. Will have to do some maths with the Arts Cyclery blog and see if anything will work with any of the Shimano DT shifters.


Top
 Profile  
 
 Post subject: Re:
PostPosted: Fri Oct 02, 2020 11:41 am 
Retro Guru

Joined: Sun Jun 10, 2012 9:49 am
Posts: 337
Location: Hampshire
Excellent, glad you found it....on my Ribble 531 competition I'm running 10 speed Dura-Ace DT shifters with a 9 speed Dura-Ace rear mech, SRAM Red front mech, 8 speed Shimano cassette 12-26 (cheap n' cheerful) and Campagnolo Record Carbon Cranks 53-39 mix n' match setup. :D
Oh..I have a Jubilee rear mech that is not on a bike yet..it's a minimalist thing of beauty...It's so cool, i just like looking at it. 8)


Top
 Profile  
 
 Post subject: Re: Re:
PostPosted: Fri Oct 02, 2020 12:55 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 10251
Location: New Forest, UK
Jonny69 wrote:
Ok so that looks like SRAM 10-speed indexes to 9 cogs of a Shimano 11-speed. 9 cogs of an 11-speed is about the same width of a 7-speed so that makes sense regarding the derailleur limit. From that, I can probably work out the original cable pull and derailleur ratio, since I know what the SRAM cable pull is and the 11-speed spacing. Will have to do some maths with the Arts Cyclery blog and see if anything will work with any of the Shimano DT shifters.


SRAM pulls loads more cable per click than Shimano - but you should be able to fix it with some flavour of JTek Shiftmate.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 13 posts ]  Go to page 1, 2  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: droppedout and 40 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group