Join Date: Feb 2004
Location: Clev Oh
Bikes: Specialized, Schwinn
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What works, what doesn't
The front der will work, but not too well.
The rear der will work, but not too well either.
The bottom bracket will not work too well because the chainline is too far offset.
The crank is obvious, at least I hope you can figure it out.
The brifters are a go.
IMO, you should sell the old 105 group, seeing as most parts will work marginally at best. If you had a double, you might be able to get away with just a crank change at best. At worst, you would have to swap out the the front der and crank. Good luck and let us know what happens.