Aleaking wheel will require the wheel and tire to be removed from the vehicle. You will need to locate the leaking area and look to see if the wheel is bent or if it's a bad tire. If you determine the leak is coming from the wheel area, you will need to dismount the tire from the wheel. The rim will need to be scuffed so that the affected area is fixed. Apply tire silicone or sealant to the wheel where the affected area was repaired and mount the wheel back on the tire.