In general, in Europe not many people use dual rears on their tractors. And we all know that is not the case in North America. So, that being said, can we brainstorm here about the types of rear axles and their benefits as well as the downsides? I have that JD4650 that has what i believe you call rear bar axles and would like to utilize them, put some duals yet not sure what other benefit aside from better grip and flotation increase I would get? Needless to say, it is an MFWD model so grip isn't really an issue. Also, anyone knows some other types of rear axles and what manufacturer has/makes the best ones? When I was looking at the new tractor i really wanted that as an option, but do I really need it? And if I opt for bar axles, i might have to buy a US or Canadian model ( Fendt per say ) meaning, i shall have to import it from North America and that would add so much extra cost to an already overpriced machine.