HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 8 posts ] 
Author Message
PostPosted: Tue Jul 02, 2013 8:31 pm 
Offline

Joined: Fri May 01, 2009 8:48 pm
Posts: 102
Needing some new chainrings and there seem to be some deals on the newer SRAM Red rings, (what is the difference between hidden bolt and non-hidden)?

Also this article below states that it is not very easy to simply bolt the new rings on the old crank, but it seems some on this forum have done it.
http://velonews.competitor.com/2012/03/ ... ity_209270

Would the non-hidden bolt chainrings mount on without the difficulty mentioned in the Velonews piece?

Also i've never swapped chainrings, do I need to pull the crank, or can I just un-bolt the old rings?

Thanks for the help.


Top
 Profile  
 
Posted: Tue Jul 02, 2013 8:31 pm 


Top
  
 
PostPosted: Wed Jul 03, 2013 6:29 am 
Offline

Joined: Tue Aug 07, 2012 6:35 am
Posts: 190
Location: Parakai, New Zealand
I have mounted the non-HB on my quarq S975 without issue, so you'll be right.

It's way easier to remove crank. Have a go, worst you can do is break a chain ring bolt if you doing it by feel!!


Top
 Profile  
 
PostPosted: Wed Jul 03, 2013 8:32 am 
Offline

Joined: Fri Dec 24, 2010 9:37 pm
Posts: 560
Location: it's raining, it must be uk
the hidden bolt simply refers to the mounting position on the yaw cranks, on old cranks the bolt isn't hidden

it's not a good idea to put the new rings on old cranks:

i) the anti-jam pin will be in the wrong place, just a cosmetic issue as long as you never have an overshift, if you do then you could end up with the chain stuck hard between crank and ring, possibly damaging something

ii) you have to file down a mounting tab on the small ring to make it fit

with the pre-yaw cranks (no hidden bolt) you can easily swap rings without removing the crankset from the bike


Top
 Profile  
 
PostPosted: Wed Jul 03, 2013 2:57 pm 
Offline

Joined: Fri May 01, 2009 8:48 pm
Posts: 102
So am I understanding properly that the non-hidden bolt rings will be compatible, or is there still an issue with the anti-jam pin? Am I better off with a set of the SRAM Red Black chainrings, or Praxis?


Top
 Profile  
 
PostPosted: Wed Jul 03, 2013 4:41 pm 
Offline

Joined: Fri Dec 24, 2010 9:37 pm
Posts: 560
Location: it's raining, it must be uk
any pre-yaw rings will be fine, hidden-bolt is specific to the yaw version

red-black, red-yellow, or original red, all will be perfect on a pre-yaw crankset, the pin will be in the correct position behind the crank arm


Top
 Profile  
 
PostPosted: Wed Jul 03, 2013 4:53 pm 
Offline

Joined: Thu Jun 09, 2011 4:10 pm
Posts: 276
The whole point of a non-hidden yaw chainring is to fit old cranks.

look at the picture at http://www.artscyclery.com/Sram_Red_Yaw ... 130BN.html

the anti jam pin sits opposite a mounting bolt, so you are fine.

Compare that to: http://www.artscyclery.com/descpage-SRCRY53130B.html, which has the anti jam pin lined up with the hidden mounting bolt.


Top
 Profile  
 
PostPosted: Wed Jul 03, 2013 5:15 pm 
Offline

Joined: Fri Dec 24, 2010 9:37 pm
Posts: 560
Location: it's raining, it must be uk
ah, hadn't seen they did a non-hidden version of the yaw ones, that's handy to know


Top
 Profile  
 
Posted: Wed Jul 03, 2013 5:15 pm 


Top
  
 
PostPosted: Wed Jul 03, 2013 6:14 pm 
Offline

Joined: Thu Jun 09, 2011 4:10 pm
Posts: 276
I suppose to answer the OP's other question, it depends on what you are trying to achieve.

The Yaw rings shift very well, but are heavy. The old red black rings IMO aren't that great. Praxis shifts almost as well as yaw, but doesn't weigh as much - there's a thread on the exogram cranks that shows the weight differences.

Also, it depends on the ratios, and whether you are going compact or not. 36/52 isn't available for yaw for instance. Compact (assuming a 16T jump between rings) is going to shift worse than standard (39/53), so you might see a bigger difference in overall shifting quality.

If you want the best front shifting, go with Yaw rings on a Yaw derailleur. If you are weight conscious, go with Praxis.

If you are on a budget, with a standard front, old red might be good enough.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 


Who is online

Users browsing this forum: Bing [Bot], Google Adsense [Bot], James_London, LasseJohansen, PLuKE, russianbear and 33 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:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. KCNC Cobweb Chainrings on 2012/13 SRAM Red Crank ???

in Road

roadytracky

0

385

Tue Jan 21, 2014 6:35 am

roadytracky View the latest post

There are no new unread posts for this topic. replacement crank decals? Or sprucing up a plain crank

in Road

davidalone

2

801

Tue Mar 11, 2014 8:52 am

davidalone View the latest post

There are no new unread posts for this topic. 130 BCD chainrings

in Road

JohnnySea

9

357

Thu Apr 24, 2014 1:49 am

mattyNor View the latest post

There are no new unread posts for this topic. Force 22 chainrings on P2M Rotor 3d?

in Road

Fhendry1

2

208

Mon Aug 11, 2014 12:01 pm

DiscoBoy View the latest post

There are no new unread posts for this topic. Dura Ace 7900 Chainrings

in Road

Feex

0

296

Fri Feb 14, 2014 4:22 am

Feex View the latest post


It is currently Sun Aug 31, 2014 11:49 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB