Yeah my SR5 was showing 24mpg (flat indiana hwy driving) but the gps speed was of by 5mph at 65mph using the my gps to monitor speed vs the speedometer. I went up 2 sizes on my tires and now the speedometer matches the gps speed but my mpgs are 14.5 and I drive like a grandpa. It's seems that...
Thanks for this. It was my question too and seeing the before and afters are really helpful. I would ask if/how you recalibrated your speedo and mpgs but I read that these are utility based and not commuters so it would make sense that you didn't. I love this look and will be changing mine asap...