Retrobike Forum Index

It is currently Thu May 24, 2018 7:28 am

* Login   * Register * Search  * FAQ

Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: Mon Dec 13, 2010 7:25 pm 
Retro Guru
User avatar

Joined: Wed Dec 19, 2007 10:05 am
Posts: 1008
Location: Brussels
Hi guys,
The RH STI unit on my cross bike gave out yesterday. Downshifting remains fine, but the ratchet just would not release to upshift. So, in the end I did the last 10km in 48x24 and spinning as fast as my out-of-shape legs would take me!

As it happens, I received in the post on Friday a pair of 9-speed Chorus Ergopower units. They were destined for an all-alloy Campag build but frankly they're a bit tired looking so I think I'll hold out for a smarter pair. They could in principle be spot-on for the 'crosser though! So, what are my options for getting a Shimergo setup going using Chorus -speed Ergos, a Tiagra rear mech, and various Shimano cassettes?

For the most part I have Dura-Ace 9-speed cassettes on my wheels, typically 12-27 though I sometimes use a 12-23 for flatter rides. Is there any way - eg via cable routing or a travel agent - that I can get a 9-speed Shimergo setup? I have a feeling that's a big No, so what are my other options?

I'm not really keen on the idea of swapping freehub bodies and cassettes throughout, and I don't really know about swapping the ratchet for a 10-speed, so perhaps the easiest thing is to replace the STI unit?

All suggestions greatly appreciated.


 Post subject:
PostPosted: Mon Dec 13, 2010 7:44 pm 
Retro Guru

Joined: Mon Feb 01, 2010 8:57 pm
Posts: 774
First off- I'd try the 'fixes' on the Highpath Engineering webby which might get it working for you.
Mercian will replace your ratchet for about £25 for a 10 speed which will index perfectly with an 8 speed Shimano cassette.
Alternatively, you could dismantle the cassette and replace the spacers - but you can only fit 8 sprockets - Shimano freehub is too short for Campagnolo 9. Highpath can do the spacers.

 Post subject:
PostPosted: Mon Dec 13, 2010 11:19 pm 
Retro Guru

Joined: Tue Jun 03, 2008 4:31 pm
Posts: 788
Why not try it first. Contrary to what many say I find that a bit of wear in the chain means that both 9 speed systems interchange. If its for the cross bike its likely that a bit of crap is more likely to spoil the change. Worth a try isn't it?

 Post subject: shimargo
PostPosted: Tue Dec 14, 2010 9:53 pm 
Retro Guru

Joined: Wed Nov 04, 2009 9:57 pm
Posts: 643
I have 9 speed ergos on my cross bike and run 9 speed shimano cassette on my best light racing wheels not a problem.
as a test my friend has nine speed shimano untegra on his cross bike and I have all campag on my training bike
for a check we swaped over rear wheels and both worked perfectly.

 Post subject:
PostPosted: Tue Dec 14, 2010 11:30 pm 
Old School Hero
User avatar

Joined: Fri Oct 22, 2010 11:32 am
Posts: 216
Location: Netherlands
It doesn't help you find a purpose for your 9-speed Chorus shifters but I read that Campagnolo 11 speed ergo's have virtually the same cable pull as Shimano 9-speed: ... patibility

 Post subject:
PostPosted: Wed Dec 15, 2010 10:38 pm 
Retro Guru
User avatar

Joined: Thu Mar 04, 2010 10:05 pm
Posts: 267
Location: High On A Hill
The answer to your problems is here

I'd been riding shimano drivetrains on both road and mtb bikes for a few years and fancied seeing what the dark/light side was like (i.e. Campagnolo).

I didn't want to spend a lot of money converting the whole drivetrain, only to find out I prefered Shimano so I bought a pair of used Chorus 9-speed ergolevers off e-bay and the Jtek No.3 which converts the cable pull from the 9-speed Campag ergolevers to the 9-speed Shimano rear mech & cassette.

I used a new gear cable as recommended and found some skipping while the cable stretched-in, but once adjusted it worked really well.

I'd definitely recommend the Jtek solution because it lets you sample the Campag style of shifting for a relatively small outlay.

8) 8) 8)

Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC [ DST ]

Who is online

Users browsing this forum: No registered users and 30 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