It really depends on what kind of bike you buy. I have a steel-frame bike with hub gearing. It's never needed any repairs for 3 years, aside from tightening a

It really depends on what kind of bike you buy. I have a steel-frame bike with hub gearing. It's never needed any repairs for 3 years, aside from tightening a bolt. It was really surprising to me that when I switched from using a derailleur to using hub gearing, I suddenly no longer needed to get my bike tuned every 2 months to avoid gears slipping. And when I got a steel frame, I suddenly no longer needed to worry about it bending out of shape all the time.