This pump is as efficient and even more efficient than other comparable brands. (You can get over 100psi with this and maybe 70psi from the crankbrothers alloy power pump pro)
To inflate tire:
- Be sure to hold the valve in the desired hole while locking the lever in place (or else the valve stem might get pushed out).
- Push AND pull the full length of the shaft (This pump is more efficient because it pumps air in when you push AND when you pull).
Remembering those two things will ensure desired tired pressure.