Hi all-new biker, new bike. I've changed two flats, before I even had ten miles on my bike! However, now have more miles but this has been a problem from day one:
When I ride, I feel this: du-dum, du-dum. I slow down the "bu-bump" slows down, I speed up, I don't feel it as much.

Is this what is referred to as "wheel trueing?" Does this happen to everyone, (at first I thought I was fixing my flats wrong, but they've been okay.
Tonight, as my ride went on, it seemed to get worse.

anyone????