Gleaner is going to be one of the best in wet conditions, yes psi is a factor but when the combine weighs a lot less to start with its going to make a big difference, the older IH combines wouldn't be a lot different but all these new monsters are going to have more problems. I've run both a R62 and a CX 860 side by side and last year working along side a slough in peas the Gleaner could go right up to the edge of the field and turn and the CX 860 sank to the front axle. Neither had duals but the CX does have bigger tires than the Gleaner, the big difference is the weight.
ground pressure, not tire pressure. im betting that the gleaner put down alot less psi onto the dirt then the cx.
another factor that can aid in this is the way the tire interacts with the ground according to the mud. our dirt, the larger the single tire the better, it traps the mud underneath almost like a pocket so it doesnt sink down as much, do to the fact the mud can escape out the side
ive found through this site and newagtalk from other farmers in other places on other dirt that duals work better due to being able to bite and pull better in dirt that is slippery and not sticky like ours.
ground pressure is universal and effected by combine balence, overall weight, and flat plate area, but what will work better as far as single/track/dual is very area dependent imo
Rear tires play important part without rwd 18.4 26 rice Cain on back Make world of difference on r72 have front dualed them up. Years ago saw 9600 dual front and rear.
In 08? I was helping a guy by Breckenridge MN in the RRV and he put a set of 36" tracks with about 8 feet on the ground and it had a Mud Hog with large tires on the back of his 2388, if that left an impression there was no attempting it with the grain buggie!
His father in law was not aware of his new tracks so he hopped in his dualed up 2wd R62 and thought he was good to roll but after about 200 feet into the field next to us he called up wondering how on earth we were going and if we could bring over the grain cart tractor to pull him out!
Any late model Gleaner transverse with 4x4 and Michelin agribib duals are hand s down the best mud machine on the market. Just abought nothing can stop it. And nothing else can come close, except a Gleaner with soucy tracks, now that is one bad combine.