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offset and back spacing the same thing?

Old Apr 25, 2010 | 05:25 PM
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Default offset and back spacing the same thing?

Trying to find wheels and tires to fit on my stock 2003 4x4 blazer. 17" or 18". I know a 30" tires should be good. 5x4 3/4 bolt pattern and a 6" backspacing. what about offset? is offset the same as back spacing?
 
Old Apr 25, 2010 | 05:37 PM
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No, they are not the same. Offset is the distance from the center of the rim to the wheel mounting surface while back spacing is the distance from the back of the rim to the wheel mounting surface.
 
Old Apr 25, 2010 | 09:11 PM
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Look into Camaro/Firebird or C5 Corvette rims to find what you are looking for, though you may have to run a spacer as some of them are a bit over 6" of backspacing.
 
Old Apr 26, 2010 | 11:15 AM
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if you change the offset the backspacing has to change right?
 
Old Apr 26, 2010 | 12:10 PM
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If the rim width stays the same, yes.
 
Old Apr 26, 2010 | 04:34 PM
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so if you have 6" backspacing then the offset will always be the same. im confused.
 
Old Apr 27, 2010 | 06:21 AM
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Go to TireRack.com and search for backspacing and/or offset. They have a complete description with a picture to explain it. Heck, you can search here as well. I know I have posted the picture before as well...

This should explain things better:
 
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