Originally Posted by
Andy_K
This would be a bit of work, but you could resolve this issue by ordering the 4700 shifters and moving the 5800 rear derailleur you already have to the 10-speed bike. That would answer the question about compatibility and tell you if the 4700+5800 shifting is really better than the 5700+5700 shifting.
It was a long shot...but I hoped maybe someone had tried and/or had an answer.
I'm pretty sure I'd like the shifting (at least the front) and the 4700 hood shape better than 5700 based on my experience with 5800 and 5700 groups.
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'14 carbon Synapse - '12 CAAD 10 5 - '99 Gary Fisher Big Sur