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 Apr 23, 2013 12:03 am 
Offline

Joined: Mon May 16, 2011 8:14 pm
Posts: 301
Just bought a used Red 2013 crankset to replace my 2012 crank. BB30. The crank came with a plastic clamp-type spacer that clamps onto the BB spindle via a small allen head bolt. I didn't have this on my 2012 crank. What is this for? Do I need this for a BB30 installation on a supersix frame? Seems like this crank also doubles as a PF30 install with some interchangeable parts, want to be sure this clamp isn't for a PF30 install.

Thanks!


Top
 Profile  
 
PostPosted: Tue Apr 23, 2013 12:19 am 
Offline

Joined: Tue Jun 08, 2010 4:58 am
Posts: 211
Location: Chicago
It's the preload adjuster.


Top
 Profile  
 
Posted: Tue Apr 23, 2013 12:19 am 


Top
  
 
PostPosted: Tue Apr 23, 2013 2:45 am 
Offline

Joined: Mon May 16, 2011 8:14 pm
Posts: 301
Thanks. Interesting, I'm not quite sure what that means. I just installed the crank with the 'preload adjuster' on, and left the 3 plastic spacers off that I had on my old setup. Seems to work just fine. The wavy washer has just a smidgen of wave left in it.

Thanks,
Todd


Top
 Profile  
 
PostPosted: Tue Apr 23, 2013 3:28 am 
Offline

Joined: Tue Jun 08, 2010 4:58 am
Posts: 211
Location: Chicago
The preload adjuster takes the place of the plastic spacers and wavy washer. Remove those and reinstall the crankset. Tighten down with a 10mm hex, then turn the preload adjuster clockwise until it is snug against the bearing shield. Tighten the 2mm allen head down and you're done.


Top
 Profile  
 
PostPosted: Tue Apr 23, 2013 8:57 am 
Offline

Joined: Fri Dec 24, 2010 9:37 pm
Posts: 562
Location: it's raining, it must be uk
^^^this

in the old days sram used a wavy washer with the adjuster, but they stopped that (imho it was easier to adjust when there was the washer)

for full instructions see...

http://cdn.sram.com/cdn/farfuture/lSlIB ... nksets.pdf

start with the adjuster at minimum, then make sure you get enough torque on the 10mm hex (c. 50Nm) *before* tightening the adjuster


Top
 Profile  
 
PostPosted: Tue Apr 23, 2013 12:53 pm 
Offline

Joined: Tue Nov 04, 2008 6:44 pm
Posts: 230
Could have just read the instructions really.


Top
 Profile  
 
PostPosted: Tue Apr 23, 2013 3:42 pm 
Offline

Joined: Sun Jul 11, 2010 6:58 pm
Posts: 236
Location: MS, USA
The instructions really are not very clear. I just installed one last night (new bb30 red quarq). For example, what is "hand tighten" on the preload adjuster? I can "hand tighten" it enough that it spreads and jumps the threads (obviously not correct, but still within the realm of possibility of hand tightening). I can also just snug it up against the bearing shield, but even then it actually snugs up a little more when you tighten the 2mm allen. It tightens up enough that there is an increase in drag. In the end, I just kept playing with it until I got no lateral play, AND no increased drag once the preload was tightened down. This meant that before tightening the preload it was barely touching the bearing shield. Hardly what I call "tight." Maybe it will develop some play and need to be tightened down some more? Finally, Even after doing all of this, the crank was not perfectly centered in the frame. I had to add a couple of the thin, clear plastic spacers to the DS to get the crank centered.

_________________
My Giant TCR Advanced SL 2014
My Specialized Venge 2013
My Scott Plasma 2


Top
 Profile  
 
PostPosted: Thu Apr 25, 2013 4:23 am 
Offline
Shop Owner

Joined: Sat Jun 13, 2009 4:02 am
Posts: 1964
Location: NoVA/DC
You got the gist of "hand tighten". Like almost all bearing systems, you want the adjustment to be as loose as possible without play.
to keep the preload collar from spreading, don't loosen the pinch bolt so much, only enough so you can turn it by hand. that will also make your initial hand adjustment more accurate. The system will not tighten up so much when you finally tighten the clamp screw.


Top
 Profile  
 
Posted: Thu Apr 25, 2013 4:23 am 


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


Who is online

Users browsing this forum: BdaGhisallo, Google [Bot], Google Adsense [Bot], madmartigan, Sjoerd, wheelsONfire, Yahoo [Bot] and 57 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. 2013 SRAM RED Shifters - ( Crank Compatibility ) ?

[ Go to page: 1, 2 ]

in Road

vai777

16

3464

Wed Jan 22, 2014 1:02 pm

Musiker View the latest post

There are no new unread posts for this topic. campagnolo spacer or no spacer

in Road

andyhunter

7

596

Sat Feb 08, 2014 2:09 am

bikerjulio View the latest post

There are no new unread posts for this topic. Installing fsa slk chainset

in Road

tinchy

2

185

Sat Jul 12, 2014 11:15 pm

tinchy View the latest post

There are no new unread posts for this topic. Installing 6870 Di2 Issue

in Road

Carrots

5

598

Wed Jun 04, 2014 8:43 pm

tnc1970 View the latest post

There are no new unread posts for this topic. Installing Recon Cassette

in Road

drainyoo

7

517

Sun Mar 09, 2014 3:49 am

drainyoo View the latest post


It is currently Mon Sep 15, 2014 10:41 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