Retrobike Forum Index

It is currently Sun Dec 04, 2016 11:23 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 12 posts ]  Go to page 1, 2  Next
Author Message
PostPosted: Wed May 22, 2013 10:26 am 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
User avatar

Joined: Mon Jun 22, 2009 11:09 am
Posts: 9399
Location: Devon
Replacing old cassette chain etc on old rock hopper...

Its obvious the chain is too slack.

Image

But I followed usual guidance of putting it in 'big big' plus two links. Any advice?!

Image

Help please!!

Asked on bikeradar and it started a bun fight so hope you can help me out more.

I don't ever use big big (obviously) but I am trying to index gears for the first time ( :oops: ) and it's impossible at the mo with my guidelines as I need to start in small small?


Top
 Profile  
 
PostPosted: Wed May 22, 2013 1:13 pm 
Retro Guru
User avatar

Joined: Sat Dec 17, 2011 11:11 pm
Posts: 873
http://sheldonbrown.com/derailer-adjustment.html#chain

Hopefully of some help!
Sounds odd though - have you changed the ratio of the cassette? (gone from 12-28 to 11-32 for example?) In which case you may need to adjust the b-limit screw (that adjusts the position of the mech around the pivot and changes it's vertical position in relation to the cassette) as the largest sprocket may be a different size and the derailleur is in the wrong position to fully tension the chain.


Top
 Profile  
 
PostPosted: Wed May 22, 2013 1:28 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
User avatar

Joined: Mon Jun 22, 2009 11:09 am
Posts: 9399
Location: Devon
Yeah, this one has a massive largest cog, the old one didn't so I know that's some of the problem. Will give that a try first.

Thanks for replying.


Top
 Profile  
 
PostPosted: Wed May 22, 2013 1:40 pm 
Retro Guru

Joined: Mon Feb 11, 2008 9:42 am
Posts: 2363
TBH, most of my 3x9/10 mtbs look like that. And have done for 20 years.

I'm far far far more likely to accidentally end up in Big/Big than small/small, so its never actually been an issue.


Top
 Profile  
 
PostPosted: Wed May 22, 2013 4:18 pm 
retrobike rider
retrobike rider
User avatar

Joined: Tue Jul 14, 2009 7:52 pm
Posts: 1904
Location: Trancecentral
Big Big plus 2 full links WITHOUT threading through the mech is how I've always done it.
The it seems just fine as you'll not use BIG BIG with the mech threaded in everyday situation.


Top
 Profile  
 
PostPosted: Wed May 22, 2013 4:36 pm 
Retro Guru
User avatar

Joined: Sat Apr 02, 2011 11:16 am
Posts: 799
Location: Camden, London
that is the way that is recommended, if you have changed the block have you checked the capacity of the changers are still valid, sometimes can still do even if exceeded, I looked at this with a short cage viewtopic.php?f=1&t=243935=


Top
 Profile  
 
PostPosted: Wed May 22, 2013 10:09 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
User avatar

Joined: Mon Jun 22, 2009 11:09 am
Posts: 9399
Location: Devon
stewlewis wrote:
Big Big plus 2 full links WITHOUT threading through the mech is how I've always done it.
The it seems just fine as you'll not use BIG BIG with the mech threaded in everyday situation.


Yeah it was measured before putting through the mechs.

Im going to leave it I think and index it in middle ring.

I calculated the mahic no and teeth are within rear mech limits so that should be ok.

Will report back. Probably next week as have a wedding this weekend...


Top
 Profile  
 
PostPosted: Wed May 22, 2013 10:16 pm 
Retro Guru

Joined: Mon Feb 11, 2008 9:42 am
Posts: 2363
It shouldn't make any difference which ring you have it in whilst indexing the back.
Obviously you want some more chain tension......... But the rear mech doesn't care.

I usually just set it up using middle or big chainring and then use the others to double check after I've finished.


Top
 Profile  
 
PostPosted: Wed May 22, 2013 10:22 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
User avatar

Joined: Mon Jun 22, 2009 11:09 am
Posts: 9399
Location: Devon
Ok. Its my first attempt so excuse my stupidness!


Top
 Profile  
 
PostPosted: Wed May 22, 2013 10:53 pm 
Retro Guru

Joined: Sat May 07, 2011 4:09 pm
Posts: 795
Location: Devon
http://sheldonbrown.com/derailer-adjustment.html#chain

Try big/big plus one full link (inner + outer/Missing Link) as per Sheldon's description above.

Cheers
Matt


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 posts ]  Go to page 1, 2  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: foz and 10 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