[DIYguy]

^^ That's why I said to buy the larger jacks if you can.
Mine aren't difficult to pump up, but I would have preferred to have the larger and wider spaced front wheels and extra safety margin.
If I ever replace them the ones you mention are likely what I would buy.
But they had nothing at our Costco at the time I purchased mine other than steel jacks.
Aluminum is the only way to go...

I should also mention that I have had one similar to this in our other garage for a very long time (but an older model).
https://www.harborfreight.com/3-ton-...ack-64544.html
It lifts my tractor quite nicely.
Even though it is aluminum it is still heavy, so I wanted something lighter to replace the one I traded away.

But I agree with you.