The stock 15" alloy wheels that came with my 1989 535i have wheel weights attached by clips to the lip of the outer wheel flange as does the "new" 16" wheels I just got. I was told by a retail tire seller that this is common. I have recently seen a thread that attaching the weights on the "inside" is the way to do this.
By this I assume they mean attaching the weight to the inside flange lip on the hub side of the wheel?

Thanks

Jim