I realize that fit and personal comfort, etc. are most important, but, I need some advice. I just got into duathlons and triathlons this year, and started with a very low end bike. I'm now looking to upgrade, but not trying to go crazy.
My question is regarding good versus average components. Are older great components better than new average components? For an average rider, with some racing goals, etc, does new outweigh better, or does quality always outweigh age?
None of the items are bad, just older or better.
I'm specifically comparing a used 2007 bike with a Shimano 105 groupset and a 2016 bike with a Tiagra groupset.