jdoc7, better re-think that. It's not so much the posts, rather the supports at each end of the cross tubes. With the standard width, I literally had about 1/4" clearance at each rear wheel. You'd be surprised what you can fit into a garage. I never thought I would have had the room, but my X-wide fit into what would be a standard with single car garage. If you have to do a little construction, do it, it's worth it!
Look very carefully at the picture of the end of each cross tube and you'll see where the space disappears. I had the standard width, installed and everything, and I took it apart, sent back the short tubes and switched it out for the longer cross tubes. The first time I was trying to put the car up on the lift, I had to have one guy at each side looking at the rear wheels to make sure I didn't tear apart my wheels, and then the truck didin't fit up the lift at all, so what was the sence? Oh, and my wheels didn't even sit fully on the runways ! They hung off each side! Nah, you have to go with X-wide. Bendpak was a gem to deal with. Didn't even charge me extra for the larger tubes, and did it on a 30 net credit. All I paid for was shipping.
I just assumed that when I went with the extra height, I would have extra width. No way. Ask Felix Unger what happens when you assume.