jongri· Premium Member
Chrysler Pacifica Fathom Blue Pearl-Coat
Gas / Hybrid:
Touring L AWD
Awesome diagram you provided here Cool Minivan..... Nobody. Appreciate your input to this post. To be safe I'll have my Chrysler dealers service check calibration anyway and adjust as needed (especially since I have the New Maximum Care Extended Warranty & don't want to risk having it voided). Paying a few $ for them to check everything w/ the 20" wheels & tires is in my best interest. Thanks again for submitting this Wheel Size/Speedometer error comparison Chart.No calibration should be needed.
A 245/60R18 is 29.6" overall.
A 245/50R20 is the same 29.6" overall, meaning there will be no affect on the speedometer because the overall diameter is the same.
View attachment 52236
Gotta remember, adjusting wheel size doesn't mean overall diameter has to change.