"Jeff Starr" wrote:
in the PerformanceBike.com catalog they show efficency specs for
many of their pumps. The rating is based on strokes to inflate both a
MTB tire and a road tire. An example would be 43/24.

That's really not an efficency spec. Those that pump more volume per stroke
require more force. The work required will be about the same. It's like the
difference between climbing a hill in a low or high gear. The higher gear
requires fewer pedal strokes, but more force.

High volume pumps might be better for MTBs.

Art Harris