I have 2, 12 foot sections of etrack in my trailer from Harbor Freight. They have screw holes every 2 inches or something insane and on both sides. After the math it equates to like 288 screws or something. Yes...I did put 288 screws in them. No bolts. If a 400 pound bike can rip out all of those screws id be impressed. I have hauled up to somewhere around 1000lb's tied down a bunch of times. aka 2 or 3 bikes, or 2 bikes and a quad. I will be hauling down in the trailer to the dragon with 4 bikes.