What is the third number stamped on the the rim mean?


Bgunner

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Location
Western Mass.
Vehicle Year
1994
Make / Model
Ford/Ranger XLT
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3.0 V6
Transmission
Manual
2WD / 4WD
2WD
Tire Size
215/75/R14 / 225/70/15
My credo
If it's not broken Don't Fix It!
As I was cleaning up the a set of rims I grabbed for snow tires I noticed that it had the size stamped into it but it had a third number after it. The stamp reads 15x7x12. I know the 15 is rim diameter and the 7 is the width of the rim but I can not figure out what the 12 means. Does anyone know what this third number represents?

These are stock ranger rims with ford part numbers stamped into them. This one has me stumped as I can tell the part number from the casting numbers but can't figure out what this 12 means.
 


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Ranger850

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Tallahassee Florida
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2001
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Ford
Engine Size
Born with a 3.0, looking for a donor V8
Transmission
Manual
2WD / 4WD
2WD
Total Lift
Stock 2"
Tire Size
Stock
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Doing things wrong, until I get it right.
Offset in millimeters, i believe either + or -
 


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