The loads that are exerted on a tow hook are different from those exerted on a towing eye ...... a towing eye has to be strong enough to take a direct tensile load only whereas a towing hook will have to take the same tensile load plus the vertical load that the trailer exerts (unless the trailer's perfectly balanced of course) .........this additional vertical load will translate into a moment caused by the lever arm length of the tow hook which in turn will cause flexure at the point where it's fixed to the bumper strut ......the result ....failure at the point where the towing arm fixes to the bumper strut, damaging the strut and allowing the trailer to become detached from the car..............so you and the Z could end up at your destination, however, the tow hook, trailer and anything that was on the trailer will definitely not
Right.............................and you think what the OP wanted to do: "It's for towing a small trailer carrying a racing Kart or Motorcycle to and from the race track" would result in such a failure?.................only asking