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Old 02-22-2017, 05:12 PM   #1
Orence1
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Help with wheel size

I am on the verge of ordering some 15"x8" Polished Torque Thrust II wheels for my 72. I want to make sure that they will fit. I took a front wheel off and measured the following using a straight edge across the wheel rim and a tape measure. Here is what I got as close as I could figure:
Backspace (flat part of hub to rim on back of wheel) = 3 1/2"
Offset (center of wheel hole thickness to rim on front of wheel) = 3 7/8"

The wheels that I am looking at are 3.79" back space and -18mm offset. (See picture)

Do you see an issue with the fitment of these Torque Thrust wheels? My primary concern is the front. Thanks in advance for any advice.
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Old 02-22-2017, 05:18 PM   #2
miller6t9
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Re: Help with wheel size

http://www.rimsntires.com/specspro.jsp

I use this calculator ......alot
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Old 02-22-2017, 06:09 PM   #3
Orence1
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Re: Help with wheel size

Entered the following:
Tire size = 265/50 R15.
Rim size = 8"
What would I enter in the offset box?
Thanks for the help
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Old 02-22-2017, 06:17 PM   #4
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Re: Help with wheel size

try to find an offset that equals whatever backspacing you are looking at on the diagram...example on an 8 inch wheel, 0 offset usually comes up to 4.5 inch backspacing...and the offset in your pic up there is -18
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Old 02-22-2017, 06:26 PM   #5
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Re: Help with wheel size

and as I sit here and think about it....I have a set of TTO 15x8.5 with that exact backspacing on my truck now and I bought a set of 18x8 with the same backspace....both fit fine
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Old 02-22-2017, 06:08 PM   #6
zicc1835
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Re: Help with wheel size

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Old 02-22-2017, 07:27 PM   #7
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Re: Help with wheel size

Are those wheels in pic the AR Outlaw II models perhaps?
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Old 02-22-2017, 07:33 PM   #8
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Re: Help with wheel size

I don't want to hijack your question, but there are SO many more choices for tires in 17" it seems crazy not to move up. I know on the front of my 69, the zero offset 17x8 would rub on the tie rod if it was a zero offset 15x8 (4.5" backspace).

235 55 17 on a 17x8 zero offset is a great setup that looks awesome IMO and fills the wheel well much better than any of the 15" choices.
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Old 02-22-2017, 11:41 PM   #9
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Re: Help with wheel size

Thanks for the help. Have an appointment on Friday with a guy who will get me straightened out.
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Old 02-23-2017, 12:12 AM   #10
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Re: Help with wheel size

Quote:
Originally Posted by Mike C View Post
I don't want to hijack your question, but there are SO many more choices for tires in 17" it seems crazy not to move up. I know on the front of my 69, the zero offset 17x8 would rub on the tie rod if it was a zero offset 15x8 (4.5" backspace).

235 55 17 on a 17x8 zero offset is a great setup that looks awesome IMO and fills the wheel well much better than any of the 15" choices.
There are a ton of 15 inch wheel tire combos in this thread that fill the wheel well quite nicely.

http://67-72chevytrucks.com/vboard/s...d.php?t=703601
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