Originally Posted by mikehuangsd

What is your motivation to change the groupset? I don't think there will be any discernible performance improvements between Claris and Tiagra. As you progress up the Shimano hierarchy of groupsets, you lose maybe 1/4 to 1/2 lb of weight per jump, and that's if you upgrade the entire groupset, and that's pretty much it. They all work fine (and no, I do not believe anyone who says that their Dura-Ace group shifts 'crisper' than Claris or Tiagra or Sora). Anyway, I digress.

I'm not judging - I modify/upgrade my numerous bikes constantly (i actually just finished converting a hybrid to gravel) - but it's more an exercise in entertainment than for any true performance improvements.