Rookie questions, but this is how we learn...
I am putting together a road bike for my wife to ride on weekends and century rides. While I want her on a great ride, It does not need to be "race light". I would prefer to use Shimano components as they are easily to obtain and seem to be a good quality, based on my limited, very limited exposure. So here the question. Based on my desire to use a 10 speed / double, can I mix the use of 105, Ultegra, and Dura Ace?
What are the benefits of using Ultegra and Dura Ace over 105, weight only?
Thanks in advance for the assistance!