Most nerf bars feature a step pad beneath each seating row. The typical SUV nerf bar will have 2 step pads per bar. Trucks are a slightly different situation. In general, standard cab trucks will have 1 step pad, extended cabs 1, large extended cabs and crew cabs 2, and quad cabs 2. Wheel-to-wheel and dually nerf bars have an extra pad at the rear wheel well.
Cab length side steps, the most common size, run the length of your truck or SUV's doors. Wheel-to-wheel models extend back to the rear wheel well, with an extra step for easy truck bed access.
The typical nerf bar can support approximately 300lbs. of weight at a time. Depending on the model, running boards can support up to 500lbs., thanks to integrated aluminum frames. Both nerf bars and running boards derive some of their holding capacity by mounting directly to your vehicle's frame.
Running boards that are equipped with lights come with all of the parts needed for installation, including a wiring harness. Straightforward instructions for wiring and installation are included with your light kit. Installation time for the light kit varies, based on your previous experience with your vehicle's electrical system.