I used a standard dot width semi trailer axle. I think the hub flange width is 70.5" or something like that, and the wheels are also standard issue semi offset. 30' of cultivator is a bit wide for the wheelbase, but it works good. I do have some spacers laying around that would give me another 18-19" of width. Maybe I will give that a try and see how it goes. The Buckeye 3 point has a float position. I pulled the pins and let the cultivators run on their depth wheels. The dolly could bounce around all it wanted then and not effect the cultivators. That Buckeye hitch sure works well.