So I decided to install some rim locks & finally had the pleasure of doing a tire change. However, when I went to pump the tires back up using a bicycle floor pump, I noticed alot of resistance in getting air in the tires. My gauge would shoot up to 60-80 psi on every pump, before slowly dropping back down. I'm thinking this doesn't feel right. Please tell me this is normal??? Did I possibly install the tube with a twist?