I have to say from experience and with a friends also, donít use one of the ones that are U-Bolt to the bumper.
There is too much flex in that bumper to hold it securely. Mine ended up punching a hole, the size of a handle grip.
. Needless to say the bikes got thrown in the bed of the truck on the way home.
My buddies bumper actually broke a weld to the frame.
If it is something you are going to do a lot, invest in an actual receiver that mounts to the frame, not the bumper. Trust me when I say, it will be cheaper in the long run.