I took off the shell I've had on since I got the truck to help someone move and my god, I gained half a gear in power! It almosts makes up for the power loss my 32x11.50s caused. I'm not sure if i'll put it back on soon. I dig the functionality and looks, but power is more important to me. Maby when we start getting snow this winter I'll put it back on for the extra weight in the rear.

 

Yep, the weight and wind resistence can make a big difference in power and gas milage. Mike