Originally Posted by
Mo06
So... err....how likely is it that the rear sprockets / front chain rings are worn with the old chain and they will not run smoothly with a replacement chain ...?
That is a hard call. I'd just buy a chain at a local bike shop. If you then see issues that are common to worn cogs, then get the freewheel, cassette or chain wheels as needed. If money is no object, remove the seat and put a new bike under it.