Back when all I had was 2wd tractors, If I had to go into an area where there was a risk of getting stuck, I would never use my largest tractor. That way I could always use the big one, held in reserve, to get the smaller one out. I have never got a 4wd stuck in 5 years since owning one. One time, when I lost traction on all 4 tires pulling a disc thru a mud-hole, I simply used the bucket to pull myself out. With 4wd, there is rarely a reason to remove the bucket, as the weight up front dont hurt you like it does on a 2wd, and you can always use it to pull or push your way out of the mud. I cant imagine a sitation that would cause me to get my 4wd with R1 tires stuck, but I have a healthy respect for the mud from many years of 2wd tractor operation.