Building off others, a lot of old steel rims are limited to 60psi, doesn't matter that the tire says, used to see people trying to inflate tires to 90psi cause it says so and wondering why it sounded like a shotgun going off. If you have one of these rims, you install the tire and tube and inflate to 15psi, check that the tire is seated evenly all the way around. There's a line above the bead of the tire that serves as a guide, it needs to be exposed all the way around. At 15psi you can use your fingers or the palm of your hand to pull it out of the rim more or push it back in some. Fill to 30psi and make sure it still looks even. At 30psi you can still hook your fingers around the tire and use the palm of your hand to pull the tire out. If its not coming out no matter how hard you try and was a problem at 15psi you can push the tire away from the rim and spray a little bike or wood polish onto the tire to help make it slippery enough to come out. Inflate to 45psi, with luck the tire has stayed even all the way around, if its slipping out deflate back down, you can't push the tire in at this pressure, if you still have a spot that is hanging up you can use channel locks to pull it out gently, spray polish if needed. If the tire is spot on at this pressure, and it should be, fill to 60 and double check but you should be good to go. Don't go over 60psi.