There are several strong points about this image. The repetition of the spokes, the repetition of the strong horizontal elements, and a repetition of circular shapes. Good image.
Very nice I'm just starting to take a couple of train shots lately and when I see something of this quaity it makes me want to go out and find more shots.
The geometry is fantastic in this picture, but I have to agree about the border. I've never been big on borders in general though... Very nice work. I'd love to see the actual print of this one.