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PostPosted: Wed Feb 12, 2014 4:09 pm 
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Joined: Sun Feb 03, 2008 4:40 pm
Posts: 185
Location: Singapore
Hi All,

I have been trying to do some research on if I can install FibreLyte or similar carbon pulleys on a XX1 rear mech. Are there any of you who know if special carbon pulleys are required if I want to install them on a XX1 rear mech or whether they are compatible at all? Heard several places that the spacing of the XX1 pulleys is different that other SRAM rear mechs, which should make the use of standard carbon pulleys an issue.

Anyone knows?

Brgds
seicmic


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Posted: Wed Feb 12, 2014 4:09 pm 


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PostPosted: Wed Feb 12, 2014 10:38 pm 
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Joined: Wed Feb 12, 2014 10:23 pm
Posts: 11
seismic wrote:
Hi All,

I have been trying to do some research on if I can install FibreLyte or similar carbon pulleys on a XX1 rear mech. Are there any of you who know if special carbon pulleys are required if I want to install them on a XX1 rear mech or whether they are compatible at all? Heard several places that the spacing of the XX1 pulleys is different that other SRAM rear mechs, which should make the use of standard carbon pulleys an issue.

Anyone knows?

Brgds
seicmic


Definitely different jockey wheels. XX1 is 12t, while X0 and other 10 speed is 11t.

Whether the size difference would affect performance, I don't know. You'd need to make sure the axle and bearing is compatible too.

It'd be interesting for someone to experiment...


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PostPosted: Fri Feb 14, 2014 12:02 am 
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Joined: Fri May 02, 2008 5:39 pm
Posts: 550
Location: Here, there and everywhere
Any 12T jockey wheel should be fine. Unless you live in a permanently dry place I wouldn't go for carbon. I am using 12T KCNC jockey wheels with a Fibre-Lyte inner mech plate on XX1 and it works perfectly. The other benefit of the Fibre Lyte cage is standard jockey bolts can be use rather than the two different sized ones required for the SRAM mech cage. It means a nice pair of KCNC jockey bolts can also be added to the tuning :D Only around 25g saved but all saved g's are useful :wink:


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PostPosted: Fri Feb 14, 2014 4:10 pm 
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Joined: Thu Oct 26, 2006 8:54 pm
Posts: 400
Location: USA
Good info here:
http://thebikeblog.de/2014/02/13/tuning ... chaltwerk/

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PostPosted: Fri Feb 14, 2014 9:00 pm 
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Joined: Fri Apr 29, 2011 3:28 pm
Posts: 159
Location: portugal
Was going to post that same link dwaharvey :D


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PostPosted: Sun Feb 16, 2014 4:03 pm 
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Joined: Fri Jan 17, 2003 6:58 am
Posts: 55
Location: Germany
Like this?

Image Image Image

Bye
Marcus


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PostPosted: Sun Feb 16, 2014 4:09 pm 
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Posts: 185
Location: Singapore
mtbmarcus wrote:
Like this?

Image Image Image

Bye
Marcus


Yes, like that. Which pulleys are those, how many teeth and do they hold up in the mud?


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PostPosted: Sun Feb 16, 2014 5:50 pm 
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Joined: Fri Jan 17, 2003 6:58 am
Posts: 55
Location: Germany
Hi,

they are new and selfmade. But not from me. A guy from light-bikes.de made them. They have 12 teeth and the same diameter of the originals. I think there will be no problem in the mud. Because of the bad weather here in Germany I did not try it yet.

Bye
Marcus


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PostPosted: Mon Feb 17, 2014 3:16 pm 
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Joined: Sun Feb 03, 2008 4:40 pm
Posts: 185
Location: Singapore
mtbmarcus wrote:
Hi,

they are new and selfmade. But not from me. A guy from light-bikes.de made them. They have 12 teeth and the same diameter of the originals. I think there will be no problem in the mud. Because of the bad weather here in Germany I did not try it yet.

Bye
Marcus


Hi Marcus,

That is just awesome. Any chance he is selling to fellow weight weenies?


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PostPosted: Mon Feb 17, 2014 8:09 pm 
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Joined: Fri May 02, 2008 5:39 pm
Posts: 550
Location: Here, there and everywhere
Quote:
I think there will be no problem in the mud. Because of the bad weather here in Germany I did not try it yet.


One statement seems to contradict the other! Seismic, I would contact someone like Fibre Lyte who make great stuff but are very open and honest to see if they think carbon jockeys are suitable for mud. As far as I am aware manufacturers have always indicated the wear rate would be unacceptably high on a carbon jockey in mud but it would be interesting to double check. I personally wouldn't ever consider carbon jockeys to save 5g over the tried and tested KCNC with the conditions we have here in the UK


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PostPosted: Wed Feb 19, 2014 1:38 am 
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in the industry
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Joined: Thu May 29, 2008 12:22 am
Posts: 598
Ask you asked….. :D

Carbon pulleys are fine in rain and light mud but I would never advise them in heavy conditions. If the mud is thick and mixes in with grit, that can get embedded between the chain and pulleys and at best cause excess wear and at worst try to split the laminate. That said, there are a number of alloy pulleys that are not so great in very muddy conditions. I still think that the best pulleys in those conditions are plastic based with brass plain bearings (bushes), but they're not very weenie.


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PostPosted: Tue Mar 11, 2014 4:34 pm 
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This guy on eBay http://stores.ebay.com/joechaimuirothshekbikeparts/ makes all kinds of Carbon Jockey wheels...his are full carbon, not sandwiched? I'm pretty sure he will custom make them for you as well.

I think mine weighed about 8 grams for the pair, and I've been using them for about a year with no problems.

Image

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PostPosted: Tue Mar 11, 2014 10:29 pm 
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Location: Vancouver, British Columbia, Canada
Apileoftile wrote:
This guy on eBay http://stores.ebay.com/joechaimuirothshekbikeparts/ makes all kinds of Carbon Jockey wheels...his are full carbon, not sandwiched?


I have used his pulleys in the past, and had a few issues with the carbon pulley moving on the bearing because the glue joint let go making rear shifting inconsistant. Has he resolved these issue?


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PostPosted: Tue Mar 11, 2014 10:41 pm 
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? I wouldn't know. I have had zero issues with mine it consistently shifts perfectly....but if I guess if I start having problems I will know where to look.

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Posted: Tue Mar 11, 2014 10:41 pm 


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PostPosted: Sat Mar 22, 2014 12:03 pm 
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Joined: Wed Jan 12, 2005 6:29 pm
Posts: 202
Location: Oslo, Norway
I just put a pair of Extralite 9g pullies on my XX1, and it shifts just fine. The Extralite pullies use dual bearings to keep the pulley as rigid as possible.

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