Definatly. Didn't check my math. That was the outside of the tire...
it was said earlier... dumpster fire... i like it.
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chaplinfj60
Well-known member
has anyone actually done the math to figure out the volume of the inside that tire and then weight of that water. hell he may only be adding 2 gallons of water and maybe wont do anything. good or bad.
has anyone actually done the math to figure out the volume of the inside that tire and then weight of that water. hell he may only be adding 2 gallons of water and maybe wont do anything. good or bad.
Nope. I'll measure a spare sxs tire when I go to the shop tonight though.
chaplinfj60
Well-known member
'84 Bronco II
El Chingón
has anyone actually done the math to figure out the volume of the inside that tire and then weight of that water. hell he may only be adding 2 gallons of water and maybe wont do anything. good or bad.
Water weighs about 8.3Lbs/gallon, so based on those numbers, roughly 170Lbs/ tire if 100% full of water, but more realistically 80-130 Lbs per tire if he fills them 50-75%. Filling them less than 50% exacerbates the sloshing issue.
chaplinfj60
Well-known member
100 lbs added to the wheel. i think Op needs to do it. i think we are making mountains- out of mole hills.
SomeGuyFromOlympia
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no way I would add that much unsprung weight to a sport machine
Etyler2
Your kind of Asshole
So the tires that now weigh let’s say 100# more each won’t change the cycling of the coil spring? How does that magic happen?
Etyler2
Your kind of Asshole
Baby golf cart parts. The up and down stuff and the spinny stuff.
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SomeGuyFromOlympia
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you would use that y to get those snow tank looking track thingswhat if you were using the sxs to plow snow?
I keep trying to fill my tracks with water but it isnt workingyou would use that y to get those snow tank looking track things
My calc on a 32" doughnut is 72 gallons. Edit. Recalculated on a doughnut with a 12" cross section. Still way to many gallons. My brain is fried from a day of work. Re re recalc'd with an even more reduced cross section and circumferance and got 42 gallons.
Last edited:
... are you accounting for the big donut hole in the middle of the tire known as the "wheel" not containing any water?
Yea i estimated the cross sectional area of the tire and multiplied it by the circumference of the tire at the middle point.... are you accounting for the big donut hole in the middle of the tire known as the "wheel" not containing any water?
You'll have to pardon me for making a ton of assumptions to make the math easier. Obviously tires aren't perfect cylinders, and I'm not accounting for the volume of the drop center in the wheel.
I'm going to burn an inch in radius and an inch in section width to make a half ass attempt to account for the rubber in the tire, assuming a 15" wheel, and 32x12 tire since that seemed to be the dimensions oddball was using.
Tire volume = V1 =πr^2h = π(14)^2(11) = 6773.2 cu in
Wheel volume = V2 = π(7.5)^2(11) = 1943.8 cu in
V1-V2 = (6773.2) - (1943.8) = 4829.4 cu in
231 cu in = 1 gal
Tire Volume = 4829.4 / 231 = 20.9 gal
I'm going to burn an inch in radius and an inch in section width to make a half ass attempt to account for the rubber in the tire, assuming a 15" wheel, and 32x12 tire since that seemed to be the dimensions oddball was using.
Tire volume = V1 =πr^2h = π(14)^2(11) = 6773.2 cu in
Wheel volume = V2 = π(7.5)^2(11) = 1943.8 cu in
V1-V2 = (6773.2) - (1943.8) = 4829.4 cu in
231 cu in = 1 gal
Tire Volume = 4829.4 / 231 = 20.9 gal
Doing it cross section x circumference is probably the issue. Basically you're finding the volume of a bunch of 1" thick slices of tire cross section.
Since those "planes" of cross section are positioned radially about the center axis of the tire, you're getting a bunch of overlap error that doesn't actually exist in the 3d space you're calculating. If that makes sense.
chaplinfj60
Well-known member
i mean if you did volume of cyl. for instance 32 inch x 9 inches wide. then subtract the rim and rough numbers get me 25 gallons? am i on the right track?
IH Man
Old Tech
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Rim size?
On the right track definitely. Those 32x9 dimensions are the outside dimensions of the tire though. You're going to come out a little high that way since you're including the tread and sidewalls in the volume this way.
chaplinfj60
Well-known member
rough numbers i bet its closer to 18 total in side
These numbers are from a tire off the rim. They will be different using different width rims and tire pressure. I forgot that I didn't have water at the shop. I'll go fill it later on...
chaplinfj60
Well-known member
man o man we are going above and beyond for a project that is not even ours. ahhahaah
Socsmm6
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Lots of gray area when trying to calculate this. 32x10.5x14 roxxzilla measures closer to 31. Then tread and carcass will take up 1.5” or so. Width im sure is 10.5 at the widest point. Lugs on the shoulder are really deep so you could knock off a couple of inches for that. 14” wheel but i guess thats at the bead. No clue what to add or subtract on it.
Im gonna have to fill it just to see. Lol
Im gonna have to fill it just to see. Lol