Quote:
Originally Posted by Optimizer
OK, so it's likely "102 cm", and not "120 cm". But am I remembering wrong, or wasn't it supposed to weigh 10 pounds? 2500g = 2.5kg = 5.5 pounds. Is the cover 4.5 pounds? 
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You have to add the weight of air, And make sure you weigh ur ball if at all possible, because the balls do not all weigh the same
