Take the 2-minute tour ×  I have a bunch of old 12v track.  I am
looking to get my son into LEGO, but I am thinking of getting
the remote set so we can expand it some more.  My question is,
can I connect the new track to the old somehow, and do the new
trains fit the old track?  share|improve this question add
comment  2 Answers  You can absolutely run RC and PF trains on
12V track. You can leave out the center conducting rail since it
won't be delivering any power to the train, unless you are
planning to run both 12V and remote trains.  The main LEGO train
sets have all used the same rail gauge, which is the main thing
that matters.  If you'd like to use both your 12V track and the
new RC track that you get, they can be joined together in
various ways. Here's an example from a LUGNET thread:  old and
new rails  There are also a few places where you can get third
party adapters if you'd prefer to go that route.  share|improve
this answer Thank you. Thinking about swapping out the 12v motor
in my 2 old trains