I have 2 installed on my cargo trailer. My son's XR70 was fine, my XT550 fell off the trailer. Upon hitting the road, the XT550's front wheel smashed the front beam (Part U) down/flat and the bike rolled forward and away from the front of the trailer. Luckily it was only 40 km/h and I looked in the mirror from behind. I braked immediately and the damage to the bike was mostly cosmetic. Now I understand why other pads on the web have extra braces on the sides instead of having to buy this product (for a big bike anyway).