The rear wheels have the same bolt pattern as many car and trailer wheels, so if there are spacers available for other things they might also work on your BX. You would have to get longer lug bolts and I don't know if they are standard or metric threads.
Also of concern would be the possibility of placing extra stress on the axle flanges by moving the tires outboard.
I can recommend Kubota's wheel weights for this model. If you don't already have them they do add a measure of stability.
Thanks for the responses. My latest thought was to put dual wheels on. Probably work on the back, but a bit tricky on the front. The front wheel is the big problem. When turning on a slope, if the little front inside/downhill wheel goes into a mole hole type depression the balance point is severely compromised.
Messing around with the front wheels will do little but screw up your steering geometry I think. Since the front axle is designed to pivot anyway, the is little you can do there to enhance the lateral stability.
The BX rims are unusually deep for their size so it would be interesting to see just how one could go about designing a functional set of dualing hardware.
What many folks with steep slopes have finally come to is the practice of traversing the slopes only straight up or straight down and never driving across the face of the slope.
Sometimes, after loading the tires or putting on the wheel weights, it is the only operational solution.
At least you can rest assured that you have purchased just about the most stable tractor on the market.
I am in the process of making my B6200 into a dual. It will have 4 wheels in the back, so the tractor won't tip. I bought two rims and two tires, and have figured out all the basics about mounting them onto the stock wheels, and there is no problem. Well, there is one problem. Let me tell you what I am doing...
The tires I have in the rear are 8.3 by 16 ag treads. Now I have 4, two for each side. On each side, the inner wheel bolts to the hub by the 6 lugs on the 6 inner holes. The rim also has 4 outer holes (square holes to fit carriage bolts to hold the wheel weights) and I bought 4 carriage bolts 12 inches long, and 1/2 inch bolts. To fit in between the two wheels as a spacer, I am using rims designed for 14 inch automobile tires, they fit exactly into the recess on each of the tractor rims,and hold the two tractor wheels about 4 inches apart so the tires don't touch or will with dirt between them. The size that fits best is A-14-DM-5 steel rims. The 4 carriage bolts fit the thing perfectly and I'm using wheel weights on the outside of the outer rims. So, to summarize, the carriage bolts go from the inner rim, through the spacer rim, then the outer rim, and finally the wheel weight, and 12 inch bolts are perfect.
The problem is, will the 4 carriage bolts be strong enough to take the torque when the inner wheel starts to turn the outer wheel, or will the whole thing twist right off? I mean, what happens if the inner wheel gets in the mud and slips and the outer wheel is on dry dirt and takes all the torque? Then all the torque is going through 4 little 1/2 inch carriage bolts. They might break. I don't know what to do that can connect the 2 wheels together in a stronger way, to take the torque. Maybe some sort of iron chucks welded between the rims so the two wheels can't twist with respect to each other, and the torque is driven by the chucks, and the carriage bolts just hold it together.
What do people normally do to connect the outer wheels to the inner ones in a permanent and strong manner?
Unverferth makes specialty, aftermarket wheel spacers and duals. And also, it is not uncommon to have duals on the front. Some turning ability is compromised, but I have seen it done many many x's on small tractors with no problems.
Well, I just finished one side, making duals with it. It looks great! Unviferth doesn't make a dual hub this size, and when I went down to the Unviferth dealer and saw the way they rig two wheels together, it's no different than what I was doing...just stick a spacer in between the two and bolt the two sides together. So, I just did it that way, and it's fine. If their way works, mine will too.