Jack

Grumpy374 wrote:
There is no "speed" advantage, but a "leverage advantage" with a larger 12 ton jack.
Yes, a smaller 6,8,10 ton jack may work, but the 12 ton is MUCH MUCH easier to jack, especially when your under the rig and your leverage with limited arm movement is there. A 12 ton might offer a smaller/shorter lift with each stroke, but that stroke is much easier.
I have bottle jacks from 2 to 20 ton at my house, and found the 12 ton is perfect, and I'm using it on a 28 ft Lexington class c.
Grumpy

I had to use our 6 ton jack once on our 24 footer on an E350 chassis when one of our Lynx leveler chocks flipped and wedged between the tail pipe and blocks while I was driving off the blocks. The safest solution was to raise the rear corner of the rig to dislodge the chock. The 6 ton jack was not easy to pump. It required some good muscle to lift the heavy rear corner of the rig, but it did do the job without concern.

I agree with Grumpy here in that the 12 ton will be the easier jack to pump. If you are at a store with a 6 & 12 ton side by side, the 12 ton is noticeably heavier, and also bigger. I can't recall if it is taller. If so, the 12 ton might present a problem with a flat tire when the lifting point is lower than the jack. Also keep in-mind if you need to watch your rig weight and have limited space.