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18 inch to 20 inch wheels. Calibration?

3.9K views 8 replies 6 participants last post by  hotrodrock  
If you are running the stock tune, I'm pretty sure Ford can adjust the speedo. If you are running an SCT tune, I've been told you can adjust the speedo using the handheld. I have a XCal2 and I cannot make that adjustment. You may need an XCal3.
 
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