Help please

[Joshg]

Ok so I put 2608mm in and this is the results: gryphon speedo and gps read the same and truck speedo reads 1-2 mph faster. My car gps doesn't have a odometer or trip thing in it so I had to get a odometer app for my iPhone, so compared to the iPhone trip/odometer my trucks odometer is right and reads the same. But I'm not sure how accurate the iPhones gps odometer is? But I did compare my iPhone gps speed to my real car gps speed and they are the same so 2 gps's are dead on with my gryphon speedo and truck speedo is 1-2 mph faster than all 3 of those. So if I havnt lost anyone lol does it sound like everything is right??

Also these are toyo mt tires, they are a E10 10 ply tire, these tires are VERY stiff hard and heavy so I'm sure that will take account for less "squish"