The concept is commonly called an anchor.

Depending on how bad you are stuck, a 2-litre bottle filled with sand and buried could provide an anchor point. Personally, I am not sure there is enough surface area to provide the necessary resistance.

A spare tire buried will provide a better anchor point.


John Stewart
Editor - 4x4Wire.com
Editor - 4x4Voice
Editor - MUIRNet-News
President - BlueRibbon Coalition