GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

offset for our trucks?

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Old Apr 27, 2008 | 03:23 PM
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Default offset for our trucks?

looking into new wheels and was wondering what the offset id need.
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Old Apr 27, 2008 | 03:34 PM
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that of course would depend on what your plans are for the truck.
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Old Apr 27, 2008 | 03:49 PM
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Originally Posted by RandomHero
that of course would depend on what your plans are for the truck.
really just looking for a front leveling kit ( still havent found) 2wd btw.
and a 33'' tire on it. not really much.
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Old Apr 27, 2008 | 04:55 PM
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um.. well if u were looking for tucks and stuff u would want a +18 at least, depending on how low u were dropping it. With 33" (I take it its some what lifted or will be??) I wouldnt worry about offset at all, cuz the 10" rims usually stick out for off road fitments. For example my rears(9in) are +0 offset and stick out of the fender about a 1/4 of an inch.
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Old Apr 27, 2008 | 06:43 PM
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im looking to level the front with the back so yes it will sit higher. just havent found the kit. but thanks for the information
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Old Apr 27, 2008 | 07:19 PM
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Stock wheels are +31mm.
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Old Apr 28, 2008 | 09:15 AM
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Keeping in mind that offset is a function of wheel width, the answer is...it depends.

Stock offset is +31mm on an 8.5" wide wheel. You do have quite a bit of room to play with, especially since you're going up instead of down. Here's a great tool for comparison:

http://www.1010tires.com/WheelOffsetCalculator.asp
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Old Apr 28, 2008 | 09:58 AM
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Offset is not a function of wheel width. Offset is the distance from wheel centerline the mounting face. You can have a 6" wide wheel or a 12" wide wheel and a +31 offset is still the same offset.

You are talking about backspacing. Backspacing takes offset and relates it to wheel width. Backspace is the distance from the inner edge of the wheel to the mounting face.
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Old Apr 28, 2008 | 10:11 AM
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You're right - sorry for not clarifying. Wheel questions like this are confusing and I attempted to make this one a bit easier. In more detail, what I was trying to say is that offset alone is insufficient to determine fitment if you're comparing wheels of different widths. Since you can determine backspacing if you know the width and offset specs, I generally leave it out of the equation.
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Old Apr 28, 2008 | 11:33 AM
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And I also assumed that he wanted factory size setup since fitting 33's isn't very difficult.
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