i was at the dealers and noticed that most of the bikes had weights on, and i think all that were spoked wheels had weights, there were a few that didn't have any on but not many, i was looking at them because mine had no weights on either wheel from new, the dealer said that not all bikes need them, but given the amount that had weights, some double rows maybe the manufacturer process is not as good as it once was.
If the wheel has the TPM's fitted it will need balance weights. Mine does and there's 2 x 20g weights fitted from the factory to take those into account on the opposite side of the valve. Nowt to do with the manufacturing process just the laws of physics.
