Just got 24 sets of these as I have a ton of old rolling stock cars with rapidos.
What wheels work well on them? I can't find wheels for sale on bachmann's site??
I have installed the old wheels from my cars (all bachmann) and they act like they are too wide, like they are riding with brakes on.

Suggestions?

Ok, so i got tge light mtn, I called bachmann and asked what chip is reccomended and got it.
Had the chip installed by a professional guitar tech (no train shops here will do benchwork and hes excellent.)
Now the loco ran perfect for 2 play sessions, a few hours each. But now it makes what sounds like a grinding sound and stops randomly (not the track)

Suggestions?
Its my first big steamer so Im kinda bummed..