Speedometer off by 10 miles after travelling 10 MPH.

[Kaylasiemon]

Hello, I have had my 2011 JKU for just over a year now & ever since I have gotten it, the speedometer has been off by 10 miles. I have adjusted the tire size appropriately but am not seeing any other results. Any advice as to what it could be? Any idea what needs to be done or replaced to fix the issue?

Thank you so much!

 

[wayoflife]

You need to calibrate your speedo to the ACTUAL size of your tire and NOT what's written on the sidewall. Most accurate way to do this is to measure from the center of your wheel to the ground and then X2