Hypertech speedometer calibrator

I was wondering if any body uses or has the hypertech tire size programmer. I on 33x12.50s right now and my speedometer is way off and I'm going bigger with 295/70r18 or 285/75r18s and it just going to be worse. I have a scanguage II from my 2012 taco but don't really want to mount that in my truck.

 

I have one in my second gen and it is super easy to set up and use. You just pull out the gauge cluster and it plugs in inline right at the speedo.

 

Okay cool thanks for the help I'll be ordering one soon!

 

does it help with fuel mileage at all?

 

I just installed one this weekend because I went to 285's. Easy mechanical install, however you have to program it before you install it and my desk top with windows 10 did not like the program and I couldn't get it to work. So I used my lap top with Windows 8 and was able to program it easily. Works great