My friend has a Specialized Roubaix with SRAM 10-speed groupset. He bought the bike used, and at some point the original front derailer was replaced with a Shimano 105 (he doesn’t remember if this happened since he owned it). I recently worked on his bike, and he mentioned that the front shifting has always been annoying.
I didn’t have any time to try adjusting the front shifting, but based on photos I’m pretty sure the FD is 5700 (2nd-gen 10-speed 105 group, where the brifters switched to shifter-cable-housing-under-bar-tape the same as Dura-Ace 7900).
At some point I’ll try to improve his front shifting, but first wanted to check - is the 5700 front derailer compatible with SRAM 10-speed double-tap front shifting? Of course there’s some room for fudging with 2x front shifting, as opposed to rear shifting increments which have to line up very close.
It should be compatible. We have gone the other way in the past with a SRAM frt der and 10 speed Shimano brifters(not 4700, which has a different cable pull ratio). It worked quite well.
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Thanks! Helpful data point for me.
On the street topic, I didn’t realize the 4700 changed the front derailleur pull ratio as well as the rear.
It may be the angle of the photo, but it looks like it is set a bit low on the seat tube. You can go to si.shimano.com and type in fd5700 and it should give you good install and adjustment instructions.
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I think it’s the angle of the photo, at least mostly. I snapped this pic to remind myself to look up FD pull compatibility. The edge of the cage clears the 50t chainring fine, though IDK how much room to spare and Shimano may recommend more clearance and perhaps that lines things up with shaping on the inner plate or the FE. I’ll take a look at that.
The main issue is it’s tough getting into the big ring, and often shifts over to the outside when it does. Again, haven’t gotten to play around with it yet, and it’s possible the initial shift-increment position, and the limit screws, are off, and this ends up easy and straightforward. But wanted to make sure (in)compatibility is not the problem first.
