I am pretty new to biking. 5 years ago, I bought a nice road bike and did a sprint triathlon. Then I didn't ride for 5 years. This year I decided to do a half IM triathlon. I had my bike tuned up and replaced the helmut. My question is, because most of the parts are 5 years old, is there anything that might need replacing just from age? I didn't ride it all for 5 years. Does anything wear out over time?