Al, are you able to recalibrate the speedometer for different diameter tires with the reflash? I'm able to do this with the reflashing software that I have for my GM car and was wondering whether you can do on the Evo.

 

I have not even tried to do this yet. So far it has not been an issue.

 

You can come within 5% as long as you match the aspect ratio (or profile) of the tire.

235/45---->255/40