Yep... that's for sure.
But I'm wondering...
as was discussed a bit above... if these front tires are starting to deteriorate so rapidly simply because of their age rather than their recent hard use or number of operating hours. My tractor is now 3 months short of being three years old (going by production date). Could that rubber age factor be the underlying cause of this apparent increasing brittleness and sudden deterioration at the hands of a few sharp rocks?

Is it time to replace them anyway and make these old tires the spares just to get some newer rubber up front? The idea of upgrading to a higher ply rating is appealing just on its own merits alone.
The GF and I were even speculating this past weekend if these are the original tires on my 2004 4110... or whether the original owner had some incident(s) and maybe swapped out damaged original tires for older used ones???

The contrast between the "like new" rears and "ready for the junkyard" fronts is really a bit troubling given that the deterioration seemed to come so quickly.
Dougster