Yeah, 120# not about 100, but now that I listened again, taking off the stock steps and adding the sliders is a net gain of about 100# I did not think these needed to have anything drilled on the frame to install, that's what I was told by RCI!
Math was correct. New sliders are 120 total but taking ~25 off of truck by removing old steps. He stated he was adding just under a 100 lbs which is correct. Now for your listening….