I have used a Pingel chock for years and a whole lot of miles. It mounts with a wing nut to a flat bracket and a countersunk nut in the floor. Take out the wing nut and the remove the chock and you got basicly a flat floor still. It's not a locking chock but I guarantee if my trailer does a roll over the bike will be still hanging upside down in the trailer lol.... I use 6 straps, 2 to the forks, 2 to the rear frame area and 2 to either the lower part of the frame or the rear wheel to keep it from kicking sideways. Compress your suspension about 1/2 way, this will keep your bike from bouncing around. Do not tie off to the handle bars because on some bikes they are rubber mounted and not that strong. Take a look at the Pingel, it's cheap and you don't need a big hunk of metal to hold your bike. The chocks job is to keep it from rolling forward not to keep the bike upright, that's the straps job. Buy good rachet straps not the Walmart cheapies.