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Spare tire well volume?

Has anyone calculated or measured the volume if you remove the spare? I searched and can't find anything.

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Old 02-10-2010, 04:30 PM   #1 (permalink)
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Default Spare tire well volume?

Has anyone calculated or measured the volume if you remove the spare? I searched and can't find anything.
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Old 02-10-2010, 08:29 PM   #2 (permalink)
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asimple way to get a rough idea is to fill the well with packing peanuts and then put them in a square cardboard box and calcualte the displacement
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Old 02-10-2010, 09:03 PM   #3 (permalink)
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Or times length times width times depth.
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Old 02-10-2010, 09:10 PM   #4 (permalink)
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the spare tire well isnt exactly a square
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Old 02-10-2010, 09:20 PM   #5 (permalink)
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Another solution would be to have a local 370z owner allow me to glass them up a custom enclosure for the tire well.
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Old 02-10-2010, 09:24 PM   #6 (permalink)
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Isn't it just a round hole? (don't have my 370 yet)

Then it would be : Pi*R^2*H
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Old 02-10-2010, 11:48 PM   #7 (permalink)
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I highly doubt it's perfectly cylindrical, but I don't have a Z yet.
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Old 02-11-2010, 09:45 AM   #8 (permalink)
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Quote:
Originally Posted by speedfreak28 View Post
Another solution would be to have a local 370z owner allow me to glass them up a custom enclosure for the tire well.
How did I know that was coming.
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Old 02-11-2010, 09:55 AM   #9 (permalink)
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The spare is an 18x4 wheel so I can guess that the tire well is probably 26 or so inches across..

3.14159 * 13^2 * 6 = 3,185.6in^3

3.14159 * (13/12)^2 * 0.5 = 1.84423ft^3

It's an estimate :P
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Old 02-11-2010, 10:31 AM   #10 (permalink)
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My head hurts after reading that. Not really thanks for the info.
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Old 02-11-2010, 01:26 PM   #11 (permalink)
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There is a ton of space down there if you pull everything out, especially those useless foam holders that hold the jack.
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Old 02-11-2010, 02:07 PM   #12 (permalink)
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Quote:
Originally Posted by FoxMan View Post
Has anyone calculated or measured the volume if you remove the spare? I searched and can't find anything.
how about you measure your spare outside the car?
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Old 02-14-2010, 01:05 PM   #13 (permalink)
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Quote:
Originally Posted by speedfreak28 View Post
asimple way to get a rough idea is to fill the well with packing peanuts and then put them in a square cardboard box and calcualte the displacement
what a great trick.
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Old 02-14-2010, 01:40 PM   #14 (permalink)
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Quote:
Originally Posted by vipor View Post
The spare is an 18x4 wheel so I can guess that the tire well is probably 26 or so inches across..

3.14159 * 13^2 * 6 = 3,185.6in^3

3.14159 * (13/12)^2 * 0.5 = 1.84423ft^3

It's an estimate :P
Try these measurements in the equitation:
Side wall-4.6, Radius-13.1, Diameter-26.1, Circumference-82.1

Spare Tire Size--- T145/80D17

Last edited by dad; 02-15-2010 at 10:07 PM. Reason: added ---
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Old 02-15-2010, 12:48 PM   #15 (permalink)
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It's really simple:
Pi * Radius * Radius * Height = volume
3.14 * 13.1 in * 13.1 in * 5.71 in = 5617.101 in^3
The 5.71" came from the tire width of 145mm.

Unit conversion is the "hard part" but google makes it more brainless than a calculator:
search "5617.101in^3 to ft^3" answers: 3.25ft^3
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