Glen,
I now have Superflex filled Ag tires on my B2400.
I am clearing saplings from part of my land, uncovering the old stone wall, and preparing the future garden site. I was uncomfortable looking down and seeing the calcium filled tires stretched by the ground clutter (sapling stumps, sharp rocks, etc.) Since I have owned the tractor punctured front tires have been common, annoying, but not much of a problem. The tractor was basically self jacking, the FEL makes a more than acceptable jack I was worried that I would puncture a filled rear tire while back in my woods. This could tip the tractor and ruin an entire day.
I decided to get Ag tires (and wheels) and fill them with the Superflex while I was making tractor upgrades.
The ride on the new tires is bumpy compared to the turf tires, as expected I can feel the Ag tire tread. I can't compare directly to Air filled turf tires since I never used them.
The stability of the tractor seems to have improved considerably. The trail into my woods seems less 'tippy' with the new tires. The tires are not set at maximum width, the dealer used a mid setting for rear tire width. This was a surprise when the tractor came back, I had expected them to be set for maximum width. The service manager explained that he was worried setting that much weight out further on the axles and he wanted to make sure that the implements cover the tracks. This is not something I could change now. The service manager said that changing it would require reversing the tires on the rims, a problem now that they are Superflex filled.
I have not done much mowing after the tractor came back but in the little I did, I see the tire imprint in my turf. The imprint was much larger with the Ag tires when I was tilling under the garden compared to turf tires. As expected the Ag tires did not track in the huge amount of mud the Turf tires would pick up whenever driven in the dirt.
I kept the turf tires (now without calcium fill) and so it is possible to change back to turf tires (I don't know how often I actually will). I was warned by the mechanic that it took two men to handle the Superflex filled tires when they installed them on the tractor. I don't know how practical it will be to change the tires for mowing. If it took two tractor mechanics, this sedentary computer programmer is in trouble attempting the change solo. I will have to come up with a way of handling the heavy Ag tires. Has anyone used a truck wheel dolly for changing heavy tractor tires? I see the dollies in the Northern Tools catalog (with the bottle jack to adjust the tire height off the floor) and they look interesting.
The other upgrades included the installation of my Gearmore top-and-tilt, a heavy duty alternator and chain hooks on my FEL bucket.