Couple things. the pump works fine for pumping up tires and I was easily able to seat two new tubeless tires without a problem. So that part of this pump works fine. It's the regular process of just wanting to pump up a tire that's a problem. Not sure if it's a defect with the one I have or just inherent in the pump design. When you attach it to your tire it takes the pressure out of the tire to "fill" the pump. So when you have a tire let's say at 85 psi and attach it. After you attach it the gauge is at 50 psi so you end up needing to pump it up even farther than you would had to initially. It keeps pressure when you detach it also but this issue where it takes pressure away from the tire is annoying. Looking to return this and get a normal pump.