5700/105 Front Shifting

Discuss light weight issues concerning road bikes & parts.
Post Reply
rijndael
Posts: 395
Joined: Tue Sep 20, 2011 12:54 pm
Location: Haines, AK - Temporarily

by rijndael

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?

system787
Posts: 138
Joined: Fri Mar 16, 2012 1:49 pm
Location: LA/OC, California

by system787

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.

rijndael
Posts: 395
Joined: Tue Sep 20, 2011 12:54 pm
Location: Haines, AK - Temporarily

by rijndael

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?

system787
Posts: 138
Joined: Fri Mar 16, 2012 1:49 pm
Location: LA/OC, California

by system787

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.

rijndael
Posts: 395
Joined: Tue Sep 20, 2011 12:54 pm
Location: Haines, AK - Temporarily

by rijndael

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.

jockster
Posts: 87
Joined: Fri Apr 13, 2012 7:25 pm

by jockster

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?

rijndael
Posts: 395
Joined: Tue Sep 20, 2011 12:54 pm
Location: Haines, AK - Temporarily

by rijndael

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.

rijndael
Posts: 395
Joined: Tue Sep 20, 2011 12:54 pm
Location: Haines, AK - Temporarily

by rijndael

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.

User avatar
F45
Posts: 871
Joined: Wed Jun 08, 2011 6:08 am

by F45

Maybe try a 6800 FD.

rijndael
Posts: 395
Joined: Tue Sep 20, 2011 12:54 pm
Location: Haines, AK - Temporarily

by rijndael

I thought 6800 had a different pull ratio and wasn't compatible?

Post Reply
  • Similar Topics
    Replies
    Views
    Last post