Gdetrailer wrote:
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If you jack directly under the axle you would only need to lift the tire about 1".
Now if you had a flat, my tire sidewalls are about 6".
Basically to change a tire you only need the jack to lift 6".
I measured my jack at 12" (6" min height + 6" lift).
The result?
the contact plate was now 3 5/8"..
The difference, 1/8"..
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Ok, I understand with a large rolling floor jack only lifting 6" you will have minimal movement. Especially if it is not near the maximum lift height. As you point out, 1/8" of movement.
But go from all the way down to all the way up, every rolling floor jack I've seen (with a single pivot at the rear) will move on its wheels while jacking on a solid floor.
I think we are all talking about the same thing except in different ways.