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STOCK MINI COOPER WHEELS

We Buy and Sell New, Used, and Reconditioned Stock Mini Cooper Wheels


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January 05, 2016


Wheel Backspacing and Offset



The offset of a Mini Cooper wheel is the measured distance between the backspacing and the centerline. The offset value of an OEM Mini Cooper wheel can be a positive number, a negative number, or have a value of zero. To determine the offset of a factory Mini Cooper wheel, a few steps must be taken.

First is to determine the wheels backspacing. This is done by placing the Mini Cooper wheel face down (preferably on a safe clean surface as not to damage the finish of the Mini Cooper wheel's face) and place a straightedge across the inboard flanges. Measure the distance from the mounting surface to the point where the tape measure or ruler meets the straightedge and save that number. That number is the Mini Cooper rim's backspacing.

Next, you can determine the Mini Cooper wheels centerline using the width of the wheel. Properly measuring the width of the Mini Cooper wheel requires a measurement using the distance between the inside of the inboard bead seat to the inside of the outboard bead seat. That distance divided by two results in the Mini Cooper wheels centerline measurement. Save this number as well.

The final step in determining the offset of a Mini Cooper wheel involves a small amount of math. Take the number that represented the backspacing and subtract from it the number that represented the centerline. Take that number and subtract an additional .5" (this is to compensate for the approximate .5" of inboard flange). This final number will result in a positive offset, a negative offset of a zero offset.

To convert inches to millimeters, multiply the inches by 25.4. To use the millimeter value, round the number to the nearest whole number. This is the Mini Cooper wheel's offset.




The Tire Industry Association (TIA) California Tire Dealers Association Specialty Equipment Market Association (SEMA)