2012 speedometer not correct

[traumajunkie769]

I have a 2012 1500 Outdoorsman 4wd with stock size tires an 72K miles. Anywhere above 25 mph, the speed is progressively off. At 40 on speedo I'm actually at 42. At 70 on the speedo, I'm running at 75-76 actual speed.

An ideas?

 

[Bigskyroadglide]

How worn are your tires? Mine was off 3 to 4 mph, replaced tires, now only off 2 mph at speed of 70. Adjusted with my programmer and dead on with gps

 

[averageguy]

Different gears?