May not want to swap tire sizes on that Ram just yet..

Apparently it can affect, as mentioned, more than the speedo. Trans shift schedules, Abs ,etc. The trucks at Dave Smiths are interesting as well, and I've read of other dealers, when modifying their trucks, using the Hypertech themselves and just charging the customer for the programmer. I have a local dealer that also modifies their trucks, so I think I'll call and ask what they do. Thanks for your replies..