Hello Tim,
I am not a very exacting measurerer, but using a yardstick type of contraption I came up with 24 feet 11 inches bumper to bumper, and then the spare tire sticks out a few inches beyond that, above the rear bumper.
I am loving my 2450 and am really happy they came up with the extra foot before I put in my order, as the extra storage space is great. I do have the ford chassis, and only the passenger seat swivels. In my layout, that is fine, though, since I have the dinette behind the driver's seat so it would do no good to swivel anyhow. The extra foot, by the way, is between the axles, making the wheelbase 170 inches, vs. the 158 inches of the 2350. I have not driven anything else, but it should count for something that I am a novice, and I am finding the handling of the rig to be totally without issue and a lovely ride!
Carol