Retrobike Forum Index

It is currently Fri Dec 09, 2016 7:02 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 24 posts ]  Go to page Previous  1, 2, 3  Next
Author Message
PostPosted: Thu Jun 27, 2013 6:25 pm 
Gold Trader
Gold Trader
User avatar

Joined: Fri Jan 23, 2009 2:30 pm
Posts: 12438
Location: Surrey
Carge wrote:
Do the Middleburn rings have lifter ramps?

I was running the same BB, with the same cranks - but with ramp-less outer ring - and had no issue.
Now running with ramps on the outer - I have the issue.

The rings do have the ramped inside edge, yes. Did you solve it? Will wear ring/chain pretty quickly I'd assume?


Top
 Profile  
 
PostPosted: Thu Jun 27, 2013 6:37 pm 
Retro Guru
User avatar

Joined: Thu Jul 26, 2012 1:31 pm
Posts: 2366
Location: The Cave of Shame
ishaw wrote:
Will wear ring/chain pretty quickly I'd assume?

Probably not tbh unless it's a real grinder of a sound. The bits rubbing are generally the same material as the bits designed to take millions of revolutions of chain and chain ring. A little rubbings just going to scuff the surface.


Top
 Profile  
 
PostPosted: Thu Jun 27, 2013 8:04 pm 
retrobike rider
retrobike rider
User avatar

Joined: Fri Aug 08, 2008 2:36 pm
Posts: 16748
Location: Yorkshire, England
It's the day Middlebury tings and the catching on the round pin/ramps.
Happens on both my setups with the= (SLX and RaceFace LP's)
I could fix the LP's by just moving them chainline out a mm or so, easily done on my bottom bracket aso it's designed to do it so next service/cleantine it give it a full turn to the drive side.
SLX would need spacers to move it out, but it sat in a box for now.


Top
 Profile  
 
PostPosted: Thu Jun 27, 2013 8:44 pm 
retrobike rider
retrobike rider
User avatar

Joined: Wed Nov 18, 2009 2:37 pm
Posts: 2036
FluffyChicken wrote:
I could fix the LP's by just moving them chainline out a mm or so, easily done on my bottom bracket ......give it a full turn to the drive side.


Damn - I can do the same with my BB - sheesh - so simple!
And if that doesn't work, then spacers...


Top
 Profile  
 
PostPosted: Thu Jun 27, 2013 8:48 pm 
Gold Trader
Gold Trader
User avatar

Joined: Fri Jan 23, 2009 2:30 pm
Posts: 12438
Location: Surrey
Could I do the same with a real bb? It has internal spacers for different shell widths.


Top
 Profile  
 
PostPosted: Thu Jun 27, 2013 8:54 pm 
retrobike rider
retrobike rider
User avatar

Joined: Fri Aug 08, 2008 2:36 pm
Posts: 16748
Location: Yorkshire, England
No idea with the real, this is a cartridge RaceFace, same for their Taperlock and ISIS signature.
1 full turn out, other side full turn in. Gives a 1mm move.
Then just tweak the front mech.
The other option is of course given above. Or probably better, spacer the top ring out so the middle doesn't do it worse with the Granny ring.
Lots of options.


Top
 Profile  
 
PostPosted: Sat Jun 29, 2013 3:51 pm 
Gold Trader
Gold Trader
User avatar

Joined: Fri Jan 23, 2009 2:30 pm
Posts: 12438
Location: Surrey
Right, I have some spacers now, but before u fit them I'm wondering where they should go, by that I mean should I push the outer ring out (currently sitting flush with the spider so would create a lip), or should I fit so the middle ring is pushed towards the granny ring?

At present, by eye it looks like the spacing between the granny and middle ring is larger than the spacing between the middle and outer.

If I push the middle towards the granny, will I just be creating the same problem between these two rings?


Top
 Profile  
 
PostPosted: Sat Jun 29, 2013 4:01 pm 
Gold Trader
Gold Trader
User avatar

Joined: Fri Jan 23, 2009 2:30 pm
Posts: 12438
Location: Surrey
Doh, spacers too small anyway, don't fit over the rear part of the chain ring bolts. Anyone have a good source for these?


Top
 Profile  
 
PostPosted: Sat Jun 29, 2013 9:11 pm 
National & North West AEC
National & North West AEC
User avatar

Joined: Mon Nov 03, 2008 12:43 am
Posts: 8146
Location: Macclesfield Forest
I'd go with the option that moves the middle ring towards the inner. I seem to recall that an old set off Deore cranks had spacers fitted there as standard.

You can get spacers in 10 packs here: --> http://www.wiggle.co.uk/id-chainring-spacers/

Or the more expensive individual option here: --> http://www.ebay.co.uk/itm/Chainring-Bol ... 0571843676

Expensive for what they are...


Top
 Profile  
 
PostPosted: Tue Jul 02, 2013 7:40 pm 
Old School Grand Master
User avatar

Joined: Sun Mar 14, 2010 3:07 pm
Posts: 4211
Location: London for my sin's
drystonepaul wrote:
I'd go with the option that moves the middle ring towards the inner. I seem to recall that an old set off Deore cranks had spacers fitted there as standard.

You can get spacers in 10 packs here: --> http://www.wiggle.co.uk/id-chainring-spacers/

Or the more expensive individual option here: --> http://www.ebay.co.uk/itm/Chainring-Bol ... 0571843676

Expensive for what they are...



Ditto Just had this on a build the XT chainset had a spiffy TA ring which pushed the centerline of the chainset out towards the big ring by 2 mm creating a ting ting on the 12 and 11 t sprockets a set of old DX middlle ring spacers and all is well> I think they were 1.5 mm thick.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 24 posts ]  Go to page Previous  1, 2, 3  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: xerxes, youngsspeed and 27 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