Last year a buddy of mine's Ford F250 died about a mile from an exit ... unloaded his heritage soft tail and pulled it to the exit and a gas station. (He's never been wrapped real tight and it was slightly down hill)
About a month ago I got passed on I70 near Rifle, Co. by a guy on a Ultra towing an Electra Glide ... with a nylon strap ... ran into them at the HD dealer (followed them there cause curiosity was killing the cat) and the electra glide had a broken belt. I asked then how fast they were going being towed. The tower said not quite 80 ...