I parked my Prius with the front wheel turned to the left. I noticed what appeared to be a balance weight on the inside rim, which normally can not be seen with the wheels straight. I have heard of a wheel balanced by putting weights on both sides of the rim. What I have a question about is the placement of the weights. The inside weight was at the six o'clock position and the outside weight was at the 2 o'clock position. Is this right? I thought that a tire was balanced by putting a weight at a single position. For a more accurate balance divide the weight in half and put one inside and the other outside of the rim. I thought both weights should be at the same, o'clock position. Can someone enlighten me on this?