Yawn:
Looks like a MTB with a tire that states 35 to 80 psi to me. But then I can read and comprehend simple concepts and extrapolate across a simple word omission. Let us go over the concept again, a lower pressure tire such as this one on this Specialized MTB in the photos is more appropriate to a high volume pump. It does not need 200 psi that my Silca or the other pumps in my photo earlier are capable of. If I were to ever purchase a true fat tire bicycle, which I never will, I would purchase a different pump, one that worked at a lower pressure but could move a lot more volume per pump stroke.
Dear fellow, perhaps you do not understand freshman Physics, but force = area X pressure. But maybe you slept through that part. Hopefully this advanced math does not strain your capabilities. This, to make it easy for you, a pump piston of a smaller diameter will require less force to reach a given pressure. But the volume would be less, do I need to get you that equation or did you sleep through that one also?
Of all the forums I visit, this forum is the worst for this sort of thing, well, the Hull Truth may have it beat on any given day but then again, maybe not.
So, I am done, with this thread, I will not come back to it again, it is ruined by a troll, my sincere apologies to the OP.