I had some BIG ole bug eyes, the first time I saw my CRs backend swapping back and forth on the trailer. I've got the bikeboot, and I've never tried to mount them diagonally. I've got a open 4x8 trailer and what I did was, I put a towel along the part of the side railing where the bikes swingarm will touch when it is pushed to the side. Then I push the bike to where the backend is butted up against the towel, and use one of the ratchet straps to hold it firmly secure (the bikes back end that is). This works perfect, and even helps when hauling 3 bikes. But then again, even with the boot locked down, I still have 3 tie downs holding the bike to the trailer :eek: I'm kinda paranoid