Originally Posted by
Bianchigirll
I ran into this late last summer. for some reason since a box containing a frame only is much lighter than a larger bix with a full bike it cost more. it has something to do with weight X the volume of the box.
I guess beacause the heavier boxes fill the truck to gross weight and the large light boxes would cause it to 'bulk out' before reaching gross weight
It's called volumetric weights, here is how it works you multiple the height x weight x length in inches, then divide by 1728 this gives you cubic feet, they make the assumption that a 1 cubic foot box weighs so many pounds, say 10.
So for the OP it would work like this 41x24x7 is 6,888 divide by 1728 leaves you with 3.986 cubic feet, they always round up, so the assumption is that the box has a volumetric weight of 40lbs. This is compared to the actual weight, and you get charged based on whichever is greater. If there is a size limit, then going over by even 1/16th of an inch can mean a lot of money.