Spedometer claibration with larger tires

[Quicksilver]

I just mounted a set of 295/35/20 Michelins on the rear my '15 GT. They replace a pair of 265/35/20's. They are a little larger in outside diameter. Is it possible to re calibrate the speedometer/odometer. If so how do you do it?

[TheMustangShow]

Yes, the simplest way is with a hand held tuner.

You can get the Tire Revolution specs from this website: https://tiresize.com/tires/Michelin/Pilot-Super-Sport.htm

http://i404.photobucket.com/albums/pp129/JTBConsulting/SHELBY/SHELBY001/IMG_4918_zpsjzzilbus.jpg (http://s404.photobucket.com/user/JTBConsulting/media/SHELBY/SHELBY001/IMG_4918_zpsjzzilbus.jpg.html)

[ZR]

Or check speedo via gps to see how far it really is n decide from there if it's worth the effort.

[Stephen06GT]

Go to 1010tires.com and check out their tire size calculator. Put in the sizes for both tires and will tell you all ten specs, including how far apart they are in OD and speedo reading.