Front tire flats

[fishpick]

So you're not supposed to load rear tires on BH models? Does that only mean with foam? Fluid filled tires compress essentially the same as air filled tires if done properly; the top quarter of the tire has air in it and you inflate to the recommended air pressure.

Correct - you are not supposed to fill rear tires on a tractor used wit ha BH with anything... apparently the 1/4 volume that remains with air in the filled tires is not enough for the compression expected with the BH... I would guess it's REALLY a combination of the "stiffness" another poster describes really well (suspension is you tire) + the fact that the BHG adds a LOT of weight to the rear so that + the loaded tires might be a little rough on the butt end of the tractor... Of course, after writing that - I would think a ballast box at the END of the 3-PT lift arms generates a lever with more force than a sub-frame mounted BH does weight wise...
SO - N80 - what it really comes down to is the manual and what it says... some is good and real facts... some is lawyer speak for "one idiot did this under this rare conditions and hurt themselves..."
I guess in my mind and my experiences with the BH on my BX25 - given the weight of the BH I don't need to load the tires and like never will... but OTOH - I was planning on loading them before I saw the manual...