I originally paid $250 for a Schwinn road bike on Amazon 5 years ago. It's been a really solid bike, even though I know it's just a mass produced brand.
I didn't know any better and did no repairs or maintenance for 5 years and it made it through 3 triathlons just fine.
6 months ago I started commuting with it and so wanted to add on a rear rack and swap out the tires. Total upgrade cost was about $200.
Just this month I wanted to get a full tune up - $124. New chain, all new cables, new grip tape, new pedals, new brake pads, etc adds up to $320 total.
So I've spend $550 in repairs and upgrades on what was originally a $250 bike. Did I make a huge mistake and should I have just bought a new commuter or road bike from a decent brand for $700, or is it just fine to spend that much on repairs?