Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Mon Jun 27, 2016 5:36 am
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED
- Avatars cannot be uploaded ✔ FIXED

Please note that we will soon do some changes in WW board template design in case to get a fully mobile/desktop responsiveness board!
If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062


All times are UTC+01:00





Post new topic  Reply to topic  [ 15 posts ] 
Author Message
PostPosted: Sun Nov 11, 2007 1:33 pm 
Offline

Joined: Sun Nov 28, 2004 1:53 am
Posts: 397
Location: Darmstadt - Germany
Hi guys,

i spend a few hours in the workshop.

I tuned my Rival rear der. to 15th lower pulley.
Weigh is at 170g. Still light.
http://picasaweb.google.com/dark.albert ... sumbauSram


dark_albert


Top
   
 Post subject:
PostPosted: Sun Nov 11, 2007 4:09 pm 
Offline
User avatar

Joined: Tue May 02, 2006 12:24 pm
Posts: 568
Location: Prague
what for?

_________________
Ellsworth Truth = 9371g


Top
   
 Post subject:
PostPosted: Sun Nov 11, 2007 4:43 pm 
Offline

Joined: Sun Nov 28, 2004 1:53 am
Posts: 397
Location: Darmstadt - Germany
do you mean what sence does it make?

it saves you power. Take a look at the search funktion. there are some threads about this.

dark_albert


Top
   
 Post subject:
PostPosted: Sun Nov 11, 2007 10:04 pm 
Offline
User avatar

Joined: Tue Sep 26, 2006 12:37 am
Posts: 5751
Location: Phoenix Arizona
There are also a few threads (or were) about running SRAM with something other than stock pulleys...

I believe depending on what you do, you run the risk of too much swing and rear DER failure.

_________________
charles@pezcyclingnews.com


Top
   
 Post subject:
PostPosted: Mon Nov 12, 2007 2:31 am 
Offline
User avatar

Joined: Thu Oct 05, 2006 4:16 am
Posts: 189
Location: Vancouver, BC
@ dark_albert: once again a really nice execution. Well done. Do you notice any extra flex in the RD now? You'll have to post some comments after you've put some miles on it.

@ pez or anyone else reading this thread that has the answer (and sorry for the slightly off-topic thread jacking :oops: ): I have only heard of Rival RD's failing. What about the Force RD? I have some carbon pulleys (11t) and a carbon cage back plate on mine - just switched from a heavier set of KCNC pulleys. Should I be worried?

_________________
This board and the world in general would be a much nicer place if everyones opinion was respected and if knowledge was shared and not slung around.


Top
   
 Post subject:
PostPosted: Mon Nov 12, 2007 5:31 am 
Offline

Joined: Sat Oct 13, 2007 7:16 am
Posts: 1343
Location: Lyon, France
dark_albert wrote:
it saves you power.


:lol: How many milliwatt?

_________________
Graham


Top
   
 Post subject:
PostPosted: Mon Nov 12, 2007 5:57 am 
Offline

Joined: Wed Aug 30, 2006 9:25 pm
Posts: 245
All it needs now are dimples.


Top
   
 Post subject:
PostPosted: Mon Nov 12, 2007 11:04 pm 
Offline
User avatar

Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7890
Location: San Francisco, CA
PezTech wrote:
There are also a few threads (or were) about running SRAM with something other than stock pulleys...

I believe depending on what you do, you run the risk of too much swing and rear DER failure.


Shouldn't a larger diameter pulley increase the effective cage length, increasing the derailleur capacity?


Top
   
 Post subject:
PostPosted: Tue Nov 13, 2007 10:51 am 
Offline
User avatar

Joined: Thu Aug 05, 2004 7:33 am
Posts: 2436
Location: Europe
Looks good Dark-Albert! Did you manage to get the original cage off the plastic parts it's fixed to without damaging it or did you just cut it off and use the remains to fix the carbon plate to? I have been looking for options to remove the outer arm from the plastic part with the feather inside but I haven't found a way to do so without damaging it to much to get back together again in the right way.

Anyway, I love your tuning jobs so thanks for sharing :thumbup:


Top
   
 Post subject:
PostPosted: Tue Nov 13, 2007 10:58 am 
Offline

Joined: Sun Nov 28, 2004 1:53 am
Posts: 397
Location: Darmstadt - Germany
hi, i just cut it. i didnĀ“t found a way to rebuild it either. But i get some contact to sram right now. maybe i can get some closer infos how to rebuild it.

dark_albert


Top
   
 Post subject:
PostPosted: Tue Nov 13, 2007 12:40 pm 
Offline
User avatar

Joined: Thu Aug 05, 2004 7:33 am
Posts: 2436
Location: Europe
Sounds good. I'm working a little on one of these as well so if you find a way around the pressed in pin maybe you could let us know? It would be convenient if they would use a small m4 or so recessed bolt instead of a pressed in pin just like the cheaper Shimano derailleurs do, it would also help people with damaged derailleurs replacing only the cage if necessary.


Top
   
PostPosted: Sun Aug 08, 2010 5:52 am 
Offline
User avatar

Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7890
Location: San Francisco, CA
Old thread, but I asked Greg Steele, who has one of Dark Albert's mod'ed Red deraillaurs, to give the pulleys a 'spin test". My SRAM pulleys spin for two seconds, which makes me happy, because that's much better than Shimano pulleys, which don't freely spin at all (based on my tests on old Dura-Ace on and what I've read @ BikeTechReview). Anyway, here's the result:



WOW! Of course, unloaded friction isn't necessarily proportional to loaded friction, but nevertheless, that is really impressive.

_________________
http://djconnel.blogspot.com/
Fuji SL/1


Top
   
PostPosted: Sun Aug 08, 2010 6:04 am 
Offline

Joined: Mon Mar 09, 2009 12:51 am
Posts: 212
Location: Tokyo
OMG! :shock: They spun forever! Impressive indeed.


Top
   
PostPosted: Sun Aug 08, 2010 10:29 am 
Offline

Joined: Mon Dec 28, 2009 8:30 pm
Posts: 5189
Location: Bay Area
I tried searching, but didn't use the right combo of terms and I want to know where to get the parts and if anyone has further tested this idea. I'm thinking of doing it to my Force der.

_________________
Don't take me too seriously.
Gramz
Strava


Top
   
PostPosted: Sun Aug 08, 2010 11:28 am 
Offline
User avatar

Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7890
Location: San Francisco, CA
I put my best attempt at modeling the effect of the 15-T cog here.

Here's the link to Dark Albert's service.

_________________
http://djconnel.blogspot.com/
Fuji SL/1


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 15 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. kcnc 15th pulley

in Road

grouk

4

431

Wed Oct 07, 2015 8:03 pm

mike View the latest post

There are no new unread posts for this topic. Sram 10 speed rear der on a 22 system?

in Road

Frankie - B

4

469

Tue Jul 28, 2015 6:20 pm

xena View the latest post

There are no new unread posts for this topic. SRAM eTap rear derailleur problem

[ Go to page: 1 2 ]

in Road

Sacke

17

2150

Thu Mar 03, 2016 7:32 pm

Sacke View the latest post

There are no new unread posts for this topic. SRAM Red 10 speed rear derailleur breaking, any experiences?

[ Go to page: 1 2 ]

in Road

josephtroppo

16

1287

Tue Dec 01, 2015 12:48 pm

josephtroppo View the latest post

There are no new unread posts for this topic. Need a lower headset top cap?

in Road

wheelsONfire

1

351

Tue Jan 05, 2016 3:12 am

danbjpa View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: addictR1, Baidu [Spider], Exabot [Bot], Google [Bot], MSNbot Media, wobbly and 18 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:  
Powered by phpBB® Forum Software © phpBB Limited