Hood and fender shake

I got 2 brand new BFG's for the back, had them mounted and balanced. Seems they had a bit of a time balancing them because I don't like to have the balance weights stuck to the outside of the rim so they do an alloy wheel balance and stick the weights on the inner edge of the rim and close to the hub center. Drove the car and it still shakes. Took it back and the balance was out again by 2.25 ozs. How can it change, the tire did not slip on the rim as we marked it and I didn't do any smokey burnouts. The rim looks to run true on the balancer, the hub center is true and the outer edges don't wobble or move up and down. I have some older chrome mod steel wheels that I guess I will have to try. This is beginning to really get to me!!! I have been to 2 different tire shops to have these wheels balanced so it isn't the calibration of 1 machine that is causing it. What next?



I feel for you, I do, but let's be more specific:
1. Did it still shake as soon as you took it out of the shop or did it only start a while later?
A. If the former, then:
I. Was the tire balanced correctly to begin with?
II. Did the weight fall off (as already suggested); as in: never really on?
III. Did you take it back, have it rebalanced?
B. If the later, then you must have dropped the weight (as already sugg).

Also, are you absolutely certain that it is the rear?