[Stickman]

I think you measure front axle to center of front drive for axle spacing, and front axle to between tandems for wheelbase. I've seen this discusion go on in many other forums before, with no end in sight. I drive a Freightliner Cascadia daycab every day, and inside the glovebox it says it has a 184 wheelbase on the data sticker. I took a tape measure to it and it measured 184" from the center of the steer axle to the empty space right between the tandems.