Whats a normal amount of wheel weight to get a balanced wheel. Went to the dealer with 20G in the rear and 10G in the front on a forged Marchesini wheel and Pirelle SuperCorsas Tires. Replaced with same type of tire and came out with no weights in the front and 80G in the rear. Is that normal? Still have to mount on bike and test but Im just curious why so much weight in the rear to balance. Red dots are lined up with the valve stem.