I have a Cannondale Synapse Carbon that came with a full Tiagra groupo. I rode a bike with Ultegra 6800 on the weekend, and I'm wondering if I upgraded the shifters on my my bike to Ultegra 6700 if I would get that same ease of shifting? Would I need to get the derailleur too? Is the 6800 smoother than the 6700? I tried 105 as well, and it didn't feel the same.
So many questions, I know! But I'm at the point of starting to wear out some bits, and considering upgrading everything to Ultegra bit by bit. I have already swapped to an Ultegra chain and cassette.