That is a lot of weight added. I wouldn't accept it. I would rotate the tire on the rim, and have the balancer understand the problem better, ie how much is the tire and how much is the rim. If they are new rims, I would be talking to the supplier.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue