# wheel width and offset questions

**URL:** <https://forums.speedlife.net/t/wheel-width-and-offset-questions/272449>\
**Category:** NYSpeed Automotive\
**Created:** [June 7, 2015, 11:22am UTC](https://forums.speedlife.net/t/wheel-width-and-offset-questions/272449 "2015-06-07T11:22:34Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Mr\_T](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mr_t/32/7454_2.png) [@Mr\_T](https://forums.speedlife.net/u/Mr_T)\
**Post date:** [June 7, 2015, 11:22am UTC](https://forums.speedlife.net/t/wheel-width-and-offset-questions/272449/1 "2015-06-07T11:22:34Z")

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So as of the last week or soo I have acquired 2 sets of wheels for my car. My car is a 2013 scion fr-s. Stock ride height. One set of wheels are 17x7 with a +40 offset. The second set are 17x8 with a +48 offset. My question is, which wheels will appear to be wider and stick further out away from the hub. The 17x7 +40 or the 17x8 +48?? would they be about the same since one is an inch wider but the other is 8mm more outward of an offset??

any Insight would be appreciated.

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**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\
**Post date:** [June 7, 2015, 11:37am UTC](https://forums.speedlife.net/t/wheel-width-and-offset-questions/272449/2 "2015-06-07T11:37:03Z")

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Front spacing (in) = (Width (in)/2) - (ET (mm) /25.4)

Figure it out from there.

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**Author:** ![1QIKZ](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1qikz/32/6112_2.png) [@1QIKZ](https://forums.speedlife.net/u/1QIKZ)\
**Post date:** [June 7, 2015, 11:52am UTC](https://forums.speedlife.net/t/wheel-width-and-offset-questions/272449/3 "2015-06-07T11:52:33Z")

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There are some websites out there that will let you plug in the info the see the changes, if you want to avoid the math.

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**Author:** ![bing](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bing/32/7211_2.png) [@bing](https://forums.speedlife.net/u/bing)\
**Post date:** [June 7, 2015, 11:59am UTC](https://forums.speedlife.net/t/wheel-width-and-offset-questions/272449/4 "2015-06-07T11:59:47Z")

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the 17x8 will appear and actually be a couple mm wider but both of them are going to suck

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**Author:** ![halas](https://avatars.discourse-cdn.com/v4/letter/h/898d66/32.png) [@halas](https://forums.speedlife.net/u/halas)\
**Post date:** [June 13, 2015, 6:11am UTC](https://forums.speedlife.net/t/wheel-width-and-offset-questions/272449/5 "2015-06-13T06:11:09Z")

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I’ve used this OG site forever - [https://www.rimsntires.com/specspro.jsp](https://www.rimsntires.com/specspro.jsp)

I’ve found it to be fairly accurate and easy to play…

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**Author:** ![1QIKZ](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1qikz/32/6112_2.png) [@1QIKZ](https://forums.speedlife.net/u/1QIKZ)\
**Post date:** [June 13, 2015, 6:24am UTC](https://forums.speedlife.net/t/wheel-width-and-offset-questions/272449/6 "2015-06-13T06:24:47Z")

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Yup, that’s the one.

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**Author:** ![manhagen](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/manhagen/32/7336_2.png) [@manhagen](https://forums.speedlife.net/u/manhagen)\
**Post date:** [June 13, 2015, 9:42am UTC](https://forums.speedlife.net/t/wheel-width-and-offset-questions/272449/7 "2015-06-13T09:42:42Z")

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[http://www.1010tires.com/Tools/Wheel-Offset-Calculator](http://www.1010tires.com/Tools/Wheel-Offset-Calculator)