I got my Brompton second hand. I believe it was originally manufactured in 2011 and I strongly suspect it's never been properly serviced - most teeth are pretty worn and the chain is sitting on circa 2-3% stretch. The rear rim is also pretty worn so I want to replace that too.
All this obviously necessitates a replacement of quite a few components, so I was hoping I might at least be able to keep the gear hub - but truth be told I have no idea how to tell whether it also needs replacing or not. Should I just assume that it's a lost cause after a decade of use with minimal servicing? Should I get a whole new rear wheel assembly? Or is there any hope in the current hub being fine and being able to rebuild the wheel on it with a new rim?
Any wisdom appreciated.