Dibs Ultegra rear mech. What diameter down tube does the 6800 fd fit?
Front mech is 28.6/31.8mm I’ve got spacers if you’re using on 28.6mm
Implying you're fresh out of negative shims. The bike I'm buying for has a 34.9mm downtube.
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Dibs Ultegra rear mech.
What diameter down tube does the 6800 fd fit?