Excuse me if this has been answered before, but I have searched and not found an answer. Can I replace an Ultegra 6603 chainring with a 6703? Specifically, the 39 tooth middle ring, but in general, any of the rings. I don't see any reason not to, but am I overlooking something? Thanks
Not wearing a helmet makes me more aware of my surroundings. I find myself anticipating the hardness of concrete 50 or 100 feet in front of me, it's almost a zen-like connection between my face and the pavement.