Hey guys, I have a quick question and hopefully you can give some input. I set my tire size on the AEV procal to 31.75 for Falken Rocky Mountain 285/70/17's which on the website show 32.8". I measured the size loaded and at 28psi. I noticed now at 40-45 mph my rpms sit at 2000rpm then once a little over 45mph shift back down into the low 1000's. It almost seems that it's reving for a while before it shifts. Anyone else have this issue or run into something similar?? Any advice would be greatly appreciated.

 

When I measured mine, I used a level and measured from the most level point to the ground. Seems to work great.

I'd try re-measuring. Disregard what the manufacturer says. You need to measure actual size.

 

Thanks suicideking!

 

Another easy way to measure is park on a flat cement surface ie garage floor and measure from the floor to the center of your hub and X2.