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PostPosted: Fri Apr 04, 2014 3:50 am 
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Joined: Wed Feb 19, 2014 6:13 am
Posts: 22
I concur the record chain is excellent, and the rings are explicitly compatible with them... Just thought it's worth a shot as far as trouble-shooting to see if that changes things.
Also may be worth making sure that the derailleur is low enough and that it's at a good angle front-to-back (not side to side) which would be a feature of the frame... e.g. close to the rings towards the front of bike, but large gap at the tail of derailleur - this is unlikely to be a factor, but sometimes is on Compact setups...

Just guessing at this point though. Good luck!!


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Posted: Fri Apr 04, 2014 3:50 am 


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PostPosted: Fri Apr 04, 2014 3:53 am 
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Joined: Tue Apr 17, 2012 11:20 am
Posts: 330
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Last edited by Causidicus on Wed Jun 18, 2014 12:32 am, edited 1 time in total.

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PostPosted: Sat Apr 05, 2014 4:14 pm 
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in the industry

Joined: Mon Apr 04, 2011 9:59 pm
Posts: 65
Location: Santa Cruz, CA
Hi folks...Adam from Praxis here.
This thread came up on my radar and I wanted to reach out.

We have a huge amount of customers with this exact setup and loving it, so I'm interested in what the possible issue is also.
Our rings on a Quarq (new and old Quarq) with Campy 11 has actually become a very common setup we've been helping people with.

One simple first fast step would be to please check the mounting. Believe it our not, we actually find that many have actually mounted our inner rings in the wrong timing position and also many times flipped the wrong way. Both of these will completely mess up the shifting.
This is one of our #1 calls/emails and is quickly fixed.
We're soon adding/updating the ring markings to make it less likely that someone accidentally mount them wrong.
Here is our mounting guide to follow - http://www.praxiscycles.com/wp-content/ ... unting.jpg

Other than checking that, like you guys mentioned in this thread...I'm very curious about the chain, the FD setup and the FD mount/braze on as we come across flexy mounts with frequency also.

Anyway...we're shifting geeks and just want to help out. So by all means email or call us and we'll for sure try and help shake down the potential issue.

Adam@Praxis

_________________
Praxis Works
Manufacturer
Santa Cruz, CA
www.praxis-works.com


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PostPosted: Tue Apr 08, 2014 4:29 am 
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Joined: Sat Feb 23, 2008 6:33 pm
Posts: 237
the rings are indeed mounted correctly. i have sent pictures to Praxis customer service when they were first warranted to confirm this. i have had 3 different mechanics look at the FD and try as they might to get it to work without success.

crankset is Quarq Riken 170 53/39
chain is Campagnolo Record 11
1st bike was a Cannondale Evo with a Braze-On mount
2nd Bike is a Litespeed C1R with Braze-On mount.

this is my second set of rings, and although it works better than the first set, they are far from what i was expecting as far as shift quality. sometimes the chain will refuse to go from the 39 to the 53 unless i drop down a gear or 2 in the rear, shift back to the 39, and then shift again to the 53. i'm not impressed at all.


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