I have a 95 F-350 with a polar ice cap depleting 460 gas hog... ...this thing gets 8 mph whether towing a fully loaded tandem axle trailer, coasting down Mount Everest or pushed out of a C-130. If I'm towing up an incline, I routinely get passed by Prius's, unicycles, wheelchairs and grandmother's with walkers. This thing can't get out of its own way...