2012 Sram Red Quarq + issues Chain Line

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upside
Posts: 601
Joined: Fri Mar 09, 2007 1:26 am
Location: USA

by upside

I am looking for some help. I installed a new BB30 Sram Red Quarq 50X34 on a Boardman 9.81 today. The first thing I found that it the chainrings sat way to far out and the chain line is out of wack. On this set-up there is 2 nylon/plastic spacers, one on the drive size that is 12mm wide and one that sits between the NDS crank and bearing pre-loader. There is no way I can get this to work. I was on the phone with Quarq, though they were very helpfull couldn't get this figured out.
Is there any one that has installed this new Red Quarq have similar issues?

deek
Posts: 406
Joined: Fri Aug 31, 2012 6:32 pm

by deek

Can you show us a picture? It sounds like you have it installed correctly...

Edit: How does the bearing adjuster look? Were you able to preload the bearings with it? Also make sure that the bearing shields are the correct ones. PF30 and BB30 are different.

by Weenie


upside
Posts: 601
Joined: Fri Mar 09, 2007 1:26 am
Location: USA

by upside

Yes, all that is correct.

sungod
Posts: 1497
Joined: Fri Dec 24, 2010 9:37 pm
Location: it's raining, it must be uk

by sungod

fwiw with the sram 2010 s975 srm, the fitting instructions were the same as the ones for normal red cranks

maybe the 2012 crank instructions will help figure it out...

http://cdn.sram.com/cdn/farfuture/lSlIBkjFhi-5ho4VoiqLvZsW0KdjrTt4vv0gC5A4P8w/mtime:1327445280/sites/default/files/techdocs/95-6115-012-000_rev_b_red_cranksets.pdf

is there any side-side play? with my s975 it was possible to slightly misalign the shaft, so that it felt like it was fully seated but wasn't, this causes the cranks to end up too far apart

mieke@quarq
in the industry
Posts: 44
Joined: Sat Aug 23, 2008 9:44 pm

by mieke@quarq

upside wrote:I am looking for some help. I installed a new BB30 Sram Red Quarq 50X34 on a Boardman 9.81 today. The first thing I found that it the chainrings sat way to far out and the chain line is out of wack. On this set-up there is 2 nylon/plastic spacers, one on the drive size that is 12mm wide and one that sits between the NDS crank and bearing pre-loader. There is no way I can get this to work. I was on the phone with Quarq, though they were very helpfull couldn't get this figured out.
Is there any one that has installed this new Red Quarq have similar issues?


Have you tried another crankset on the bike and measured the chainline differences from that crank to the SRAM Red Quarq? We just spoke to a guy at SRAM's dealer service and he also assured us that the chainline of the regular SRAM BB30 cranks and our SRAM Red Quarq BB30 cranks should be very similar.

It sounds like you are installing it correctly. It does look at bit unique with the spacer on the drive side, but that is how they are supposed to be. The SRAM Red BB30 Quarq cranks are different from the regular SRAM Red cranks in that the regular SRAM Red BB30 cranks have a shorter spindle and do not have the drive side spacer like our cranks. That extra space where we have to use a spacer is taken up on the regular SRAM Red BB30 cranks in the inherent spider / spindle design.

Pete Jacobs, 2012 Ironman champion has a Boardman bike with a SRAM Red BB30 Quarq so we would expect this setup to also work on your bike as well: http://www.slowtwitch.com/Products/Tri_Bike_by_brand/Pete_Jacob_s_Boardman_AiR_3161.html

I'm not sure if our tech showed you the link on our website to the Red Quarq BB30 installation addendum: http://www.quarq.com/i/95-6118-004-000_REV_A_RED_Quarq_BB30_IA_Addendum.pdf

Mieke
Quarq Technology

upside
Posts: 601
Joined: Fri Mar 09, 2007 1:26 am
Location: USA

by upside

Yes, I installed another BB30 and the chain line did not change.. [b]so It is in the design of the bike[/b]. I have never seen anything as severe as on this Boardman. I found another thread about the Boardman 9.81 with chain line issues similar to what I have been experiencing. It is quite severe in the big ring and largest cog in back.

Thanks everyone

ceilersen
Posts: 2
Joined: Fri Sep 16, 2016 11:08 pm

by ceilersen

Hi,

Just re-activating a very old thread.. :)
I just bought a 2016 Boardman Air 9.8 and have fitted my Quarg red22 BB30 Power meter on it. I am experiencing the exact same issues as you have - The chainline is off by a wide margin. I have to be in the 2-3 smallest cogs in the back to get a decent line.
- Did anyone find a decent solution to the problem?

I am considering replacing the wide driveside spacer with something 5-6 mm narrower, and adding the same amount of spacers on the ND side instead - Not a pretty solution, but I dont see any other way?

kind regards
Christian

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Rick
Posts: 2018
Joined: Sat Aug 29, 2009 4:30 pm

by Rick

I am not sure if you SHOULD have to do it, or if the fault is in the cranks or frame (most likely the frame). But it is pretty simple to adjust chainline with spacers sold by Wheels Manufacturing and purchasable on ebay.

In fact, I have just done that recently on one of my old bikes. I also used them to make sure that the Q is completely symmetric, Left & Right.

by Weenie


ceilersen
Posts: 2
Joined: Fri Sep 16, 2016 11:08 pm

by ceilersen

Well I have now moved the chainrings inwards by 2.5mm by adding spacers on the NDS and exchanging the 13mm standard spacer on the drive side with smaller spacers..

Seems to work well on the work stand, now with a much nicer chain line.
If you look closely you can detect the slightly different spacing between the crankarms and the frame on either side, and thereby the different Q-factor - but hopefully the shift towards the NDS is so small, that it wont mean to much for my pedal position and cause knee issues or other nasty things..

christian

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