Tires Slope with a 4100??? Cost of Ag tires???

[36Tango]

I pick up my 4100 with turf tires this next week. My property is fairly rough terrain (very steep in some places), so I intend to at least attempt chains before buying ag tires. My question is, what kind of slope will the 4100 handle? The tires are not loaded, but there is a box full of concrete on the 3 point.
I am sure that it will be spelled out in the owners manual, but am curious. i will be intalling one of those nifty slope gauges.
Thanks in advance.