I'm not sure what you mean by regular maintenance. For 10 years I've been casually using an $800 Kona flat-bar bike, 24 speeds, and I didn't need to change anyt

I'm not sure what you mean by regular maintenance. For 10 years I've been casually using an $800 Kona flat-bar bike, 24 speeds, and I didn't need to change anything on it. It was pretty much maintenance free. I did last year took it in for checks, just to be on the safe side, but they said that it is fine and nothing needs fixing.