On my Ford 1920 when I got new tires on the front, 8.00-18 6PR R1, I had them foam filled. At least 15 years ago. Seems like tires cost $150 each and the foam was an additional $150 each. They are very heavy. Steering & ride are fine even at -10* F. The foam has saved me from many flats. Tractor loader is used mostly for rough cleanup jobs like dumpsites and transient campsite abatements. Also have foam fill on the 6 rear tires on a 15 ft. Batwing mower. Pulled lots of sharp objects from those tires - broken coil spring, piece of rebar, bottom of a broken beer mug etc. When mowing an area that looks bad I mow into it going backwards. Saves the tractor tires. Where you need protection from flats, foam is the way to go. The only downside to foam is they don/t dissipate heat. So you can't travel over about 25 MPH. Some people transport batwing mowers over the road by hitching to a the pickup and towing like a trailer. That will ruin the foam fill & tire. I drive the tractor/mower from jobsite to jobsite. Max groundspeed is ~18 MPH. Or have the equipment transported by semi. Works for me.
