# 5 x 4.5 wheels on 5 x 114.3 S14
**URL:** https://forums.speedlife.net/t/5-x-4-5-wheels-on-5-x-114-3-s14/86127
**Category:** SON240sx Automotive
**Created:** [June 2, 2005, 3:55pm UTC](https://forums.speedlife.net/t/5-x-4-5-wheels-on-5-x-114-3-s14/86127 "2005-06-02T15:55:22Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@bing](https://forums.speedlife.net/u/bing)
#### Post date: [June 2, 2005, 3:55pm UTC](https://forums.speedlife.net/t/5-x-4-5-wheels-on-5-x-114-3-s14/86127/1 "2005-06-02T15:55:22Z")
i just want to confirm that this will work…
in addition to this i would like to know what back-space i should get.
i cant comprehend the conversion of offset to back space…
what the deal?
i am getting 15 x 8 inch wheels in 5x4.5 with custom backspace that i have to specify before they are made… what should i get?
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### Author:  [@Cal](https://forums.speedlife.net/u/Cal)
#### Post date: [June 2, 2005, 4:24pm UTC](https://forums.speedlife.net/t/5-x-4-5-wheels-on-5-x-114-3-s14/86127/2 "2005-06-02T16:24:25Z")
POSITIVE OFFSET
NEGATIVE OFFSET
There ya go Bing, hope it helps you in unerstanding backspacing.
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### Author:  [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)
#### Post date: [June 2, 2005, 5:46pm UTC](https://forums.speedlife.net/t/5-x-4-5-wheels-on-5-x-114-3-s14/86127/3 "2005-06-02T17:46:59Z")
Bing FYI 114.3 millimeters = 4.5 inches
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### Author:  [@bing](https://forums.speedlife.net/u/bing)
#### Post date: [June 4, 2005, 3:37pm UTC](https://forums.speedlife.net/t/5-x-4-5-wheels-on-5-x-114-3-s14/86127/4 "2005-06-04T15:37:40Z")
ok neither of you guys helped me out here…lol
i already know that the mustand 5 lug pattern fits the S14 so that isnt in question.
i also understand mm offsets…
what i dont really know is BACKSPACING
if i get a 15 x 8 with a 4" backspace is that a 0 offset? seeing as how it is 4" from either the back or front of the wheel.
so what i am asking is how to convert offset to backspace or at least what backspace to specify for a 15 x 8 wheel
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### Author:  [@iQuAGoD](https://forums.speedlife.net/u/iQuAGoD)
#### Post date: [June 4, 2005, 6:26pm UTC](https://forums.speedlife.net/t/5-x-4-5-wheels-on-5-x-114-3-s14/86127/5 "2005-06-04T18:26:56Z")
> [@bing](#):
>
> ok neither of you guys helped me out here…lol
>
> i already know that the mustand 5 lug pattern fits the S14 so that isnt in question.
>
> i also understand mm offsets…
>
> what i dont really know is BACKSPACING
>
> if i get a 15 x 8 with a 4" backspace is that a 0 offset? seeing as how it is 4" from either the back or front of the wheel.
>
> so what i am asking is how to convert offset to backspace or at least what backspace to specify for a 15 x 8 wheel
Offset = distance of the mounting face from the center of the wheel
Backspace = distance from mounting face to back of wheel
Start in the middle. As offset increases, backspace also increases.
For example an 8 inch wheel with 0 offset will have 4" backspace
That 8 inch wheel with +10 offset will have 4" +10mm backspace
That 8 inch wheel with -10 offset would have 4" -10mm backspace
Backspace is a useful measurement when determining how wide of rim
and how low an offset on such rim can be used before hitting suspension
components.
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### Author:  [@Gonad](https://forums.speedlife.net/u/Gonad)
#### Post date: [June 4, 2005, 6:41pm UTC](https://forums.speedlife.net/t/5-x-4-5-wheels-on-5-x-114-3-s14/86127/6 "2005-06-04T18:41:54Z")
[http://www.son240sx.ca/wheelcalc.php](http://www.son240sx.ca/wheelcalc.php)
According to that, a 15x8 +14.6mm is equivalent to a
15x6 +40mm :dunno: