I just put new rims, tires, and spacers on my car. When I coast I hear a thumping noise from what seems to be my rear driver side tire. The faster I coast, the faster the thumping...the slower I coast, the slower the thumping, seems like it thumps on every tire rotation. There is no noise when I press the accelerator, only when I coast. The tire isn't rubbing anything and there was no noise before the new wheels. Any thoughts on how to diagnose or the problem? I'm going to see if I can find out the problem myself then take it to a shop if I can't fix it.

 

Did you perhaps left a TPMS sensor inside the tire?

 

Good thought, but the TPMS sensors are still inside my winter tires, tucked away til November (Ive since disabled TPMS in my car). I thought the tire place could have accidentally dropped something inside the tire, but I'd probably hear it when I accelerate...as soon as I touch the gas, the noise stops.

 

Think about this when accelerating the UFO is slapped against the tire. When decelarating, the UFO falls, hence the thump. Perhaps a valve stem?

 

Hmm, I could take the wheel off and shake it to see if I hear anything inside it. It's def. worth a try.

 

do you have a midget locked inside your trunk? if so, let him out and the noise should go away.

 

Depends, whether the midget is a she or a he...maybe needs to stay.

 

haha thanks liquid

 

Ha- ha, who is Bridget?