How do I determine if my front wheel is warped? I've noticed that as I ride my bike, my front wheel/tire appears to wobble back and forth. I assumed that the wheel was simply a bit loose, but as far as I can tell, it isn't loose (or at least not very loose).

It does appear, however, that my front tire is ever so slightly warped in a sort of Pringle shape.


  Is there a way to determine for certain whether or not the wheel is warped?


Follow-up questions regarding how to solve the problem will likely appear soon, but that is not the point of this particular post.
Lift the bike up and spin the wheel while you watch it closely, at the top of the fork.

The tire should remain centered between the two sides of the fork as it spins, and the surface of the tire should not move closer to nor further away from the top of the fork.

If you have rim brakes, the rim should remain in exactly the same place relative to the pads as it spins.

In cycling vernacular, you need to check if your wheel is true.

This video covers the entire wheel truing process: