Bad bearing is one problem. A bent rim can do that. Or, of you have ever been in any situation that would cause the frame to bend; a wreck, driving into a ditch, hitting a curb too hard, all of these things can cause this. You can fix any of the above except frame damage. Once frame damage occurrs, its almost impossible to fix, unless you want to take the car apart back down to the frame, then have someone fix it.
A tire wobbles when the nuts have not been tightened sufficiently.
There can be several reasons for a tire wobble on a motorcycle. Here are a few things to check. Check the tire's inflation. An under-inflated tire can cause a wobble. Even if the tire is new, tubeles tires may leak especially if there is some fault with the rim. Or there may be a small puncture. Since the wheel has just been balanced, this is hardly a cause but what if it was balanced wrong? However, wrong balance would mostly cause a vibration at higher speeds. If the tire is a rear tire, then it could be misaligned, that is to say, wrongly placed so that it is skewed. This can cause tire wobble. Damaged or warped rim or break rotor can also cause a wobble. The part of the tire that is closest to the damaged part will have a tendency to jump when it hits the road. As can be seen from this, a front and a rear wheel can have similar problems which cause a wobble but more things can potentially go wrong with the rear wheel.
Swap rear tires from right to left, see if the wobble changes sides. If the wobble changed sides you have a bent rim or a bad tire. If the wobble didn't change sides you have a bent axle or hub.
You have a damaged tire. Try rotating the front tires with the rear tires to see if the wobble switches to the back.
I would say the drve train would cause a vibration. A wobble could be from a bad tire, unbalanced tire, bent rim, bad tie rod joint.
could be a tire out of balance or vehicle out of alignment
Something is wrong ! - wheel may be loose, tire may be separated inside or wheel bearing is shot.
bad rear swing arm bushings on some you can tighten
It's loose ! the bearing is loose, the shock is dead, the ball joint is worn.
I dont think a tire will wobble unless the entire wheel wobbles.... Problems with the undercarraige could cause this. Also if a tire has uneven treadwear from a poor alignment, it could wobble. A missing balance weight, or improperly balanced tire could cause wobble. Emergency braking could leave a flat spot in the tire. Check all four tires for treadwear patterns, to see if the tire is balding in one section faster than others. Ideally it will bald from the center outwards evenly as the tire ages. If the tires look even, then most likely a problem with the undercarraige is causing the wheel to wobble (broken, worn or missing component). A tire could have internal belt damage from hitting a deep pot hole hard and cause it to wobble after.
broken belt in a tire. if you feel it in the steering wheel it usually a front tire or a rear if you can feel it in the seat
Bad tire? Bad wheel bearing? Bent wheel? Bent axle?