I'll have to run back out and check, but I'm fairly positive that the inside of my tire clears the drive shaft. But it's really not a whole lot- maybe 1" to 1 1/2". My knuckles just fit. The bottom picture that I posted is likely the most accurate, but even that is hard to tell from just a picture.
Sorry about the slide out issues. I'm having issues with one of my bunkhouse slides. In fact, my dealer said that they're not equipped to handle it, so they've arranged for the camper to head back to the factory next month.