I'm a mountain biker and have rails on my bike transporter body. While the bikes are attached to the trunk, the rims are not. When I saw that in Mike Rowe's video, I had to investigate further. I have a Toyota Tacmoa (05+) and not many people make bed rail accessories. However, Master Lock did a very good job on this lock. Bought two, one for each side of the bed. Each lock took about 5 minutes to install and they attach very firmly to the Toyota body rails. I already have a cable that I've used to lock bikes in the past, but I've used a U-lock before. Now I can just thread the cable through bikes, rims or whatever I have on the back and have it clipped on the other side in seconds. The lock is a pin lock only but I have used them on my caravan in the past and have been very happy with how they hold up to the weather. I expect the same from them.