Thanks Wolfman. I didn't realize that about the rims. That's a bummer. Both are 4x4 gear driven w/o loader. Is the b7100, if fitted with Aggies, more capable in true "off road" setting than the b6200? The videos on YouTube makes the 7100 out to be unstoppable in deep mud and snow.
I can say the b7100's are tough tough tough, I have 2 HST model's right now, trying to sell one of them.
the B6200 is very similar build wise, just a few added features.
One advantage to the B6200 is a little larger engine (D850) and a water pump and a remote dynamo/ alternator, where the B7100 has a (D750) with a thermosiphon system and a dynamo where the water pump is normally.
I have altered both of mine, one is a D950 with all the bells and whistles, like key stop, 125 amp alternator (way overkill), and more HP, the other is a D850 fully rebuilt with all Kubota parts.
They are built very well, have the ability and power to do a ton of work.
they will take a fair amount of normal abuse, just stay on top of fixing issues so they don't compound on each other.
Now as far as going from Turfs to AG's, I went a different route with mine just for use in the woods and snow, I have Truck mud tires on mine, They match the RC perfectly so I have no 4wd issues and they bite really hard, chains are cheap for them too, one other advantage is they are wide and with the loaded they are heavy.
One thing I don't like is the lack of Power / hydrostatic steering.
If my second B7100 doesn't sell i will had hydrostatic steering from that parts I have, also toying with the Idea of stretching it and making a road grader out of it.