why would u need a 20 ton jack ? u pickin semis up?
We have two 12 ton. Used them to change a tire, lifting from the frame per Lippert, one on either side of the wheels, was easy-as-pie, no worries at all.
We also use them sometimes as "poor man's Level-Up" on either side in front of the front tires, just adds stability and takes the bounce out.
Only down-side they are heavy!
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