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  #1  
Old 11-11-2010, 01:54 PM
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Default Offset/Backspace of stock/factory rims

Hi guys,

iīve got a question about the ofset/backspace of a 1995 Chevy S10 Blazer.

I want buy some new rims, but in germany the regulation of car modifications are very hard.
The rims must not stuck out of the Fenders.
Now, I have the stock rims with 265/70R15 on stock rims, like these on my blazer.
To decide which rims would be legal, I would like to know what the offset of these rims is.
I searched everywere, but I nowhere found the offset.Click the image to open in full size.

If anyone could help me,
I would be very happy.

Thanks a lot

Greetings from Germany,
Christian
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Old 11-11-2010, 01:58 PM
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Back spacing is 6''
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Old 11-11-2010, 02:05 PM
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Correct
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Old 11-11-2010, 02:10 PM
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Thanks for your answer!!!

The offset is so much?
Ok, that explaines why the tire rubbing on the frames, while I have 30mm wheel spacer on every front wheel.

I want want new rims, because I donīt like wheel spacers.
Now I can calculate the Offset of the new rims.

Fortunately, no german police officer have no notion about american cars.

Thank You!!
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Old 11-11-2010, 03:31 PM
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Look for a wheel with a 5" or 5.5" backspace.
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Old 11-11-2010, 03:40 PM
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Ok, thanks, but iīve got a little dumb question, yet.
How did you measure the offset?
From the inner side of the Rim?
I think itīs so much, the rim-width is only 7".
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Old 11-11-2010, 03:41 PM
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The offset is +51 and the backspacing is 6 inches.

The backspacing is measured from the hubface of the wheel to the inner edge of the wheel.

Once you have the backspacing, you can calculate the offset

Click the image to open in full size.

Click the image to open in full size.
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Last edited by mdehoogh; 11-11-2010 at 03:44 PM.
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Old 11-11-2010, 03:44 PM
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Offset and Backspace are two different datas?
I donīt know, because in Germany thereīs only one data.
I think it should be the offset.
Ok, so I learned some new things.
Thanks
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Old 11-11-2010, 04:11 PM
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Quote:
Originally Posted by christian1984 View Post
Offset and Backspace are two different datas?
I donīt know, because in Germany thereīs only one data.
I think it should be the offset.
Ok, so I learned some new things.
Thanks
That is correct,

Offset is the distance from the center line of the wheel to the hub mounting face.

Backspacing (or rear spacing at the bottom in the picture below) is the distance from the hub mounting face to the inner edge of the wheel

Click the image to open in full size.

It can be confusing trying to match up several different measurements and aspects of the wheel
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Old 11-11-2010, 04:23 PM
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Dehooooooogh to the rescue!
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cant blow off heads and remove the fuel fill lines at the same time. lol
Old 11-11-2010, 04:23 PM
 
 
 
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1995, 2001, 97, backspace, backspacing, blazer, chevy, correct, factory, offset, rim, rims, s10, stock, wheel


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