My bike currently has a Shimano Tiagra Front Derailler, I am being offered by my friend at a low price a Shimano Ultegra FD.
My question is, is it worth buying and replacing the Tiagra? Or dont fix something that's not broken?
What advantage will the model swap do, if any? Or the advantages negligible.
The Rear Derailler is a Shimano 105.