I just bought a Yahama XT225....I used to ride dirt bikes 20 years ago and decided to get something tame and street legal.....well I got on it and hit a huge pothole on the road at about 60 mph. I'm very fortunate that it didn't land land me in the emergency room.....but now there is a big knot in the front rim. I'm old and things change ...so I'm going to ask a stupid question. Does this tire have a tube? I'm assuming it does because it didn't go flat. Thanks!