I've used on many times with no problems. Even went from MI to CA using one but, I did use extra bungies to secure the rack (which I highly recommend) I have only had an issue once when I went too fast over an unusually large speed bump. The bikes and rack went flying...... but, in that case, I was not using any extra straps/bungies. Both bikes were fine though. A little scratched but, still ok.