This pump will automatically shut off at around 35psi. I turn it back on and only get 10psi then it turns off so I turn it back on and I get about 5psi. Basically, I get diminishing returns when trying to inflate my bike tires that require 75-100 psi pressure. I bought it to use on my bike tires. So if you plan to use it to inflate your bike tires, look elsewhere.