Hi, I was trying to go up to a bank to retrive a fence post and spun out getting there. Slope maybe 12-15 degrees . I thought it would make it, but with 4wd spun out anyway. I was surprised. I have a Kubota about 1900lbs bare , 4wd and front loader and a rear brush cutter and loaded tires added. Still spun out. What is the expected slope anyone can get up on or is the weight of everything going to tie me down.