Does anyone happen to know if the speedometer/odometer is read off the front or rear wheels? I was wondering if changing the overall size of the rear wheel tires o.d. would affect these.
Thanks.

 

umm, i don't know if it's off front or back (i would tend to think the rear)

but yes, if you change the wheel overall diameter you will definitely affect the speed. i have over spec wheels (20s) on gs4 and i am off a little

 

Pretty sure it's the rear since when I am peeling out, the speedometer goes up but I'm not moving.

 

Its from the rear.

 

It actually comes off the drive shaft somewhere. -Roger