Want to swap out my 18 inch fx4 factory wheels with factory 20 inch wheels is there going to be a recalibration issue with the speedo.

 

Depends on the tire size

 

I am not sure it is whatever the ford factory 20 inch wheels come with, it is Pirrellis I believe.I just want to make the swap easy on the dealer so he can;t say know,I ordered it with 18S but would prefer the 20 inchers.

 

They are probably the same size.

 

I will have to measure to be sure, it is a warranty issue. they won:t do the swap unless it does not affect the speedo.

 

They can probably recalib the computer..

 

If they are overall the same size including the tire of course, than you'll be fine.

 

The 20's run a 275/55/20 pirelli atr tire, that equals 32", which I think is the same height as a standard 4x4 18s tire. Post your stock tire size and I can tell you if the speedo will be off.