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Old 05-02-2008, 12:55 AM   #1
HoupPhotography
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Wheel Question

I have 20" wheels with 50 series tires on my truck now, how much will the truck drop when I put a 15" wheel on with a 4" white wall (I don't know what sidewall heighth those have)
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Old 05-02-2008, 02:18 AM   #2
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Re: Wheel Question

Use this and put in the size tire you currently have and then the new size or sizes you want to run. Figure the difference in height and 1/2 the difference of the two is how much drop you'll see. Again, this is approximately

http://www.1010tires.com/TireSizeCalculator.asp

Example

255/50x20 = 30" tall
255/70x15 = 29" tall
235/75x15 = 28.9" tall

265/70x17 = 31.6" tall
275/55x20 = 31.9 " tall

So going from a 20 to a 15 you might only drop a 1/2"depending on the size/profile tire.
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Last edited by Palf70Step; 05-02-2008 at 02:18 AM.
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Old 05-02-2008, 05:07 AM   #3
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Re: Wheel Question

I'm going from a 275\55R\20 to a 215\70R15 my truck will drop about 5inches.... am I reading that right?

The overall diameter is going from 31.90 to 26.85
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Old 05-02-2008, 05:30 AM   #4
67_C-30
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Re: Wheel Question

Quote:
Originally Posted by HoupPhotography View Post
I'm going from a 27555R20 to a 21570R15 my truck will drop about 5inches.... am I reading that right?

The overall diameter is going from 31.90 to 26.85
No, it will be a 2.525" drop because you have to divide the diameter by 2 to get the distance from the center of the hub to the ground.
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