Moving spare tire to rear

[meesda]

What would be the approx. shift of weight if I move a 40 lbs spare from the front of a fiver to the rear bumper. Would the pin weight go down by approx 80 lbs? I know there could be a lot of variables but would 80 lbs a good guestimate.

[Artum_Snowbird]

Weight times distance = weight times distance.

So, a spare tire in front 40 pounds at (distance from center of axles) will equal less weight on the pin.

like this. 40 X 15 = 600 (to location of spare is 15 feet)

then X (at the pin) times (say 20 feet) would then work out X is 30

So.. taking the 40 pound tire off will drop the pin weight by 30.

Use that now to where the tire goes on the back. Maybe only ten feet behind the center of axles. So.. 40 at 10 feet = only 20 at 20 feet.

Removing the wheel takes off 30. Putting it behind (in my case) would take off 20 more. So a loss in pin weight of 50 pounds.

[jmtandem]

What would be the approx. shift of weight if I move a 40 lbs spare from the front of a fiver to the rear bumper. Would the pin weight go down by approx 80 lbs? I know there could be a lot of variables but would 80 lbs a good guestimate.

It depends on the distance from the current spare location relative to the center of the axles and the new position on the bumper also relative to the axles. If you have a Sherline or other scale just move the spare and measure pin weight before and after.

[We_Cant_Wait]

I doubt you'd see at the most about a 50lb difference, 40lbs. for the tire and about 10 lbs. because of the lever factor if that much. If you're trying to lighten you pin weight then you'll have to move a BUNCH of weight inside the trl from front to rear.