Too general, this <i>highly</i> depends on what type&#x2F;brand&#x2F;price range of bicycle you buy. My first &#x27;grown up&#x27; cycle is now 23 years old and I can get any parts I need to service it in the local bike shop.<p>Thinking of it, it seems that proven parts just keep existing while the crap gets sorted out during the years. In some subgenres this goes faster and the process is still heavily ongoing I have the impression - take bmx for instance: what you can get now for a similar amount of money is lighter but as strong or stronger and longer lasting.