so just my 2 cents at seasons end....
I have a race specific bike. Only one, so without a pit bike. I raced 17 times this season. I need to replace these things for next season. Tires, Bar Tape, Cables, Saddle, Brake Pads and the hoods on my shifters.
that is it. Even if I had a second bike, the list would probably be the same, except for each bike.