Hey guys, I've been fiddeling around with my custom tunes recently, but my speedometer is waaaay off now, like 5 - 7 mph at 70 - 80 mph. I've got oversized 265/75/16 tires on my truck. Stock was 255/70/16. My Edge manual says the MM number I should enter is 2524. By doing my own math with the equation that Edge gives us, it should be 2526. However, it's still off. Any ideas on how to fix it? And yes I remember to correct the gear ratio..