Wow, I like all the different responses. I should have made a poll for this thread. To clarify somethings:
- They are ~25 years old
- Traction is not a problem. The lugs are still large. Only 650 hours and all on grass and dirt
- Liquid ballast at about 75%
- They are currently tubed with the originals. Not sure how long they hold
- They do not leak. Rarely have to air them up.
- I try to always cut straight up and down. There are times when I have to turn around but I do that in the less steep area - 10% slope.
- Bought the tractor used 15 years ago. Since then it has always been fully covered in the barn. Dont know about the first ten years.
- Catastrophic failure at the wrong time is the only concern because of steep slopes - 25 degree and a bit more in one area. Rolling the tractor or having to deal with a flat, with the cutter and FEL attached, on a slope sounds like a bad time.
Are the sidewalls really 3/4" thick? They are 4 ply Firestones.
I also read that tubed tires go flat faster than tubeless?