This pump reportedly can pump up to 100 psi but is not able to pump above 30 psi. Granted it’s a small pump and I got it for emergency situations but I did expect something a bit better. I had to grease up the o-ring on the piston to avoid air leakage. I did a test on a 700c 25 C tire and after 150 pumps I had only reached the 30 psi. After a further 50 pumps it had not gone up much. This is a small cheap pump so can’t really expect much from it but the glowing reviews I read before purchasing it were very incorrect. Ok
Very nice.