bziggy

Hello I wanted to know if any one can tell my what to do or what they have done. I am putting on 22.5 wheels from the factory 17" wheels. I wanted to know what to do to get the speed o to read the correct speed with the new 22.5. tires. I do not want to regear the rears. Thank you for any help.

RAMRODD

On my 06 their were only 2 options Smarty or Superchips. But I have read here that on the 05 and older the dealer can change the speedo.

booman70

Had mine done @ the dealer you need the rpm for the tire or some programmers do it

goodeyesniper75

I used the superlift truspeed.

bob4x4

The 05 can be reset at the dealer,it would be a wise thing to be able to supply them with the revs per mile#.You should be able to get that # from the tire companies web site.

Bob