I had some new 31x10.5x15 BFG's installed at Discount tire. 2 tires have 4 weights next to each other to balance them. One totals 4.25oz. and one 3.75 oz. Does this seem excessive? I have never seen tires with weights like that. My previous 2 sets of tires balanced a lot nicer. I took them back a second time to be balanced and they came back like this again. I am having some vibration issues and I think this may be a possible cause.