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post #1 of 13 Old 03-10-2012, 01:56 PM Thread Starter
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Rim offset

What do I need to know about the offset on after market rims with our trucks?
I am looking at a set that are -12. What dies that mean exactly?

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post #2 of 13 Old 03-10-2012, 03:13 PM
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Offset

The offset of a wheel is the distance from the mounting surface of the wheel to the true centerline of the rim. A positive offset means the mounting surface of the wheel is positioned in front of the true centerline of the rim / tire assembly. This in effect brings the tire in to the fender well more. Conversely, a negative offset means the mounting surface of the wheel is behind the true centerline of the rim / tire assembly. This will cause the tire to stick out away from the vehicle.

To compare the effects of changing the offset and width of your wheels use the
Wheel Offset Calculator


Wheel Offset Calculator

Also read this https://www.rsracing.com/tech-wheel.html

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post #3 of 13 Old 03-10-2012, 03:46 PM Thread Starter
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Thank you sir. I'm trying to decide how far the rims will stick out from under the fender wells. Good info thanks

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post #4 of 13 Old 03-11-2012, 08:15 AM
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I run +1 a +12 would stick them in 1/2" more.


2011 F250 PowerStroke CCSB Lariat FX4 Loaded | Icon 2.5" Stage 2 | Icon track bar | Top Gun Dual Stabilizers | 20" Fuel Boost wheels +1 offset | 325-60-20 Hankook Dynapro ATm | RBP RX3 steps | BakFlip F1 Bed Cover | All Sales Mfg Fuel Door | Randy Ellis Light Bar | Hella Lights | aFe Magnum FLOW Pro-GUARD 7 Air Filter |


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post #5 of 13 Old 03-11-2012, 08:35 AM Thread Starter
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This is making my head hurt. lol I'm looking at a set of XD rims 20x9 that have a -12 off set. That should make them stick out correct?

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post #6 of 13 Old 03-11-2012, 12:48 PM
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Maybe this will help.



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post #7 of 13 Old 03-12-2012, 09:00 PM
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You first posted a +12 offset that would stick out 1/2" less than a 0 offset. But now your saying -12 that would stick out 1/2" more than a 0 offset. The offsets are in millimeters. The photo in my last post is hard to tell but the tire tread stick out about 1".

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post #8 of 13 Old 03-13-2012, 02:09 AM
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This is a pic of my trucks wheels. Tires are 33x12.5x20. On fuel hostages 20x10 -24 offset hope this helps


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post #9 of 13 Old 03-13-2012, 03:59 AM Thread Starter
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Quote:
Originally Posted by vlxjim View Post
You first posted a +12 offset that would stick out 1/2" less than a 0 offset. But now your saying -12 that would stick out 1/2" more than a 0 offset. The offsets are in millimeters. The photo in my last post is hard to tell but the tire tread stick out about 1".
Yes I did, my apologizes. -12 would be the correct of set I am asking about. Thanks

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post #10 of 13 Old 03-13-2012, 07:41 PM
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Quote:
Originally Posted by 6.4ford View Post
This is a pic of my trucks wheels. Tires are 33x12.5x20. On fuel hostages 20x10 -24 offset hope this helps


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That looks more like a +24. If it was a -24 and they are 10" wide they would stick out 1.5" more than my 9" +1 offset wheels. Your's don't look like that. But they do look to be .5" less or more than mine. Which at +24 it would be 1" less than mine but add the .5" and your .5" less than mine.

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