N scale coaling tower needed

[ham99]

I would like to put a coaling tower on my locomotive service track, but the space between tracks [roadbed to roadbed, not track to track] is only 2 1/8 inches. Can anyone tell me the base dimensions of the Bachmann Plus coaling tower? It doesn't say on the box, and I don't want to buy it if it won't fit. It's the only kit my LHS has in stock, but if there are others that would fit -- what are they?