Originally Posted by LotusChris
That single post lift looks great but why would they sell stabilizing jacks?
I suspect that the stabilizing jacks are more of a jackstand to hold the car up when working on it (lifting a wheel off the ramps to do brake work, etc. The single post lift would be similar to a two post lift, in that it would need to be bolted to the garage floor. This means that the garage floor would have to be reinforced - probably much more so than for a two post lift.
Two post lifts are good for lifting a car for doing suspension/brake work - but they are not good for storing a car (long term "drooped" suspension is bad for the longevity of the suspension bushings).
A four post "drive on" lift is good for storing a car (suspension remains loaded) and doing oil changes, etc. Lifting a wheel for brake or suspension work takes a bit more, but a sliding jack tray allows the car to be lifted from the lift.
The single post lift appears to be similar to a four post lift in that the car is supported on ramps (suspension remains loaded) for storage (and hopefully it's clear under neath for oil changes, etc.), but would require a reinforced garage floor.
One other advantages of the four post lift is that the lift is "free standing" - it does not need to be bolted to the floor and in fact, casters can be added to make the four post lift movable (I have heard of at least one person that uses this feature to move the lift outside to raise the car and wash underneath
If my garage was higher (I only have an 8 foot or so ceiling), I'd be getting a four post lift to work on cars and be able to store one.