Radial singles vs bias duals

I have a deere 4430 that has good year dyna torques getting toward the end of their life. Those tires are junk to begin with so anything is an upgrade. Our 4320 had the same tires and went to Firestones bias and that was a big difference. Struggled with 5-16 plow before, handles it very well now. Anyway, the 4430 has 20.8-38's on it. Also have a set of snap on duals. Worked very well with a 21ft vibrashank and packer this spring. Do think I needed the duals, especially in hills and lighter, looser ground. Use the same tractor to round bale and mow hay so it is set wide. I did chisel plow some with it last fall with a krause 2800 7 shank without the duels. Did ok, but was lacking for traction once in a while. If I put the duels on, half the outside Tire will be in the already worked dirt while chisel plowing. I also don't want to narrow it up. It's nice being wide for hay. I'm hoping it can be dueless all the time with radials. If not, I'll probably stick with bias to go with the duels. Tire Guy says you shouldn't mix the two. Says having a bias outside Tire won't let the radials flex. What do you guys think? I'll make it work one way or another, just curious.

I know with trucks hauling grain With an old KB-7 corn binder truck....a friend of my dads tried that about 20 years ago and put dual radials on the rear and left the bias on the front. First he almost went off of the blank blank road. And the next twenty miles to the mill he couldn't go any faster than 30 miles an hour. When he got back to the tire place he almost ripped the place apart!!!! Went back to all bias. Bias are stiff and radial are not. You can figure it out as everything will turn WAY squishy! I would guess that radials on tractors would dig better but I would guess BOTH need to be the same?

I"ve been running radial inside/bias outside duals for several decades on multiple tractors- never an issue. Only have one now with both being radials, since I replaced the worn radials with new ones, and used the old radial for duals. All duals are run at about 2/3 the pressure of the inside tires.

A radial's advantage comes from flexing to follow the ground better. They aren't going to be a magic fix for not enough tire on the ground. Run the bias duals at a lower pressure so the radials can still flex a bit. Or better yet, if the duals are just about bald, don't worry about it, they are already shorter.

If I was spending money on new tires I would not waste money on bias. It is now the 21 st century and might as well spend money on 21 st century tire technology. You can always up the pressure on the radials to match the bias duels if you have to until you can get radial duels but that negates the advantage of the radials which is the flexing at lower pressures so it has a larger contact patch and lowers compaction.

All things equal a radial tire has less rolling resistance and more traction than a bias.