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 Post subject: 5700/105 Front Shifting
PostPosted: Tue Oct 22, 2013 1:41 pm 
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Joined: Tue Sep 20, 2011 12:54 pm
Posts: 395
Location: Haines, AK - Temporarily
I have Shimano 105 Shifters (5700) with a CX70 front derailleur. I'm used to the new SRAM Red front shifting and I find this Shimano setup lacking. Are there other FDs that would improve this setup, like a 7800 or 7900, or would a larger upgrade be in order?


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PostPosted: Tue Oct 22, 2013 1:48 pm 
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Joined: Fri Mar 16, 2012 1:49 pm
Posts: 138
Location: LA/OC, California
You could just use a sram red yaw 10 speed fd with that. You can also maximize shifting by making sure the fd cable is as friction free as possible.

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PostPosted: Tue Oct 22, 2013 1:59 pm 
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Location: Haines, AK - Temporarily
system787 wrote:
You could just use a sram red yaw 10 speed fd with that.
I wondered about that, thanks. Is there a 10 speed Force Yaw FD? Or was that only introduced with 11 speed?


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PostPosted: Tue Oct 22, 2013 6:34 pm 
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Location: LA/OC, California
There is not a Force yaw FD for 10 speed. The 11 speed cage is a reportedly narrower, so it probably won't work well.

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PostPosted: Tue Oct 22, 2013 6:54 pm 
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Location: Haines, AK - Temporarily
OK. Now I just have to decide if I want to sink any money in to it when I could just spend a bit more and get a SRAM Force 22 mini-groupset (less calipers and crank). There seems to be a lot of year end deals out there.


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PostPosted: Tue Oct 22, 2013 9:50 pm 
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Joined: Fri Apr 13, 2012 7:25 pm
Posts: 87
What is the trouble with your 105/CX70 combo?

I have used exactly this setup on my previous cyclocross bike with fantastic shifting. What chainrings do you use?


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PostPosted: Wed Oct 23, 2013 12:11 am 
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Joined: Tue Sep 20, 2011 12:54 pm
Posts: 395
Location: Haines, AK - Temporarily
I'm not happy with how long it takes the 50 ring to fully catch. If I shift it 75%, small pause, then shift the last 25% - it's great. If I do it all one one sweep it is less than great.

I'm using a SRAM XGlide rings on a Red spider. It came with a boat anchor FSA Omega crank with FSA rings, but I didn't care for it. Since I have a SRAM Red Quarq on my other bike, and I may use it on this bike if I travel, I wanted to use a similar crank to minimize the FD changes if I moved the power meter over. FWIW: It's a BB30 frame.

This is loads better than with the FSA rings, but it's not quite as good as I'm used to.


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PostPosted: Wed Oct 23, 2013 12:54 am 
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Posts: 395
Location: Haines, AK - Temporarily
Since I have small hands, I'm starting to wonder if it's related to the lever's throw length. I haven't measured it, but the SRAM Red (2012) feels like a shorter throw.


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PostPosted: Wed Oct 23, 2013 1:10 am 
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Joined: Wed Jun 08, 2011 6:08 am
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Maybe try a 6800 FD.


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PostPosted: Wed Oct 23, 2013 2:25 am 
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Joined: Tue Sep 20, 2011 12:54 pm
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Location: Haines, AK - Temporarily
I thought 6800 had a different pull ratio and wasn't compatible?


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