Review on Upgraded Emoly Bike Pump: Portable Mini Foot Bicycle Pump with Pressure Gauge, Universal Presta and Schrader Valve Compatibility, Tire Inflation Device (Blue) by Zachary Spaulding

I think you get what you pay for. So I just got myself a USB digital pump and wanted to check the accuracy here. I inflated my tires to 60psi with this foot pump. I then immediately tested it with a digital pump and it showed 44psi. So that's almost 20 psi! Not good. I always suspected I was riding flatter than I thought I would, always felt sluggish. In addition, the design of this thing is such that it often falls over when you use it. It also feels like it's about to explode or explode or something like that when you hit the higher PSI. I'm glad I have a digital pump, I will use it from now on.