JJS
Guest
The weak point would be your tires.The rest of the machine would take it. The 860 has the same final drives and the same ,only wider, axel. and a 200bu grain tank.Most of those extensions add about 40bu. to the grain tank of the 850. I had a set on a 750 and had no trouble.But I had 30.5 X 32 tires.Your tires might be enough, it would depend on what size of header you have. Good luck! Joe