Here's my experience with RC's Speedometer Calibrator.
Definitely corrected the speedo BUT...Disabled my Start Stop (with an accompanying warning to "service the start stop" ... and a dash amber warning light for the same) and threw 2 PCM codes.
When I put it back to stock it corrected...
No rubbing whatsoever, even at full lock for daily driving. The Rubicon takes it with no issue for street use...it laughs at it. My tire guy said he thought it would rub, they were shocked. LOL
I am sure there would be some if you started to do some real off roading.
I have a 2.5 inch lift...