[migs1369]

i got a set of 265/60x18 my stock tires were 265/70x18 and the new set trew my speedo off by 4 mph slower, is there a way to adjust the speedo or should i just levea it alone

 

[Izzysplace]

I think superchips makes a speedo calibrator for our trucks. My speedo is pretty far off also and I'm running 35"s I just rely on my GPS most of the time to tell me how fast I am going