It's a tubeless tire situation and my first experience with a rimtape with valve stem attached to it. I totally cleaned the inside of rim until it looked brand new but didn't do anything to the rimtape. Used tons of soapy water and inflated and re-inflated over a dozen times but couldn't get that last little bit of the tire to seat properly until i cranked up the pressure. Read a lot about adding a tube and rimlock but it's on a bike that's 15 years old and probably always worked tubeless before.