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Not that its any big deal, but I personally buy wheels with BB on the axle. one side or both. because that frees the wheels (independently) to go different speeds around curves , thus reduces drag. That on my heavy cars is where its important.
The "real" trains don't have as tight of curves as we do.
I would not spend the money on the other unless I can find a reason for it.
The "real" trains don't have as tight of curves as we do.
I would not spend the money on the other unless I can find a reason for it.