Cobra Trailer Spare Tire mount failure

The problem with this design has 2 major problems:

1. The stress generated by the motion of the spare fore and aft is directly transmitted to these 2 8mm bolts.

2. The 8mm bolts are welded to the mount. Welding changes the metallurgical nature of the bolts, embrittling them at the weld (https://en.wikipedia.org/wiki/Hydrogen_embrittlement).

Your fix solves the first problem by adding a 3rd mounting point, but does nothing about the 2nd problem. At least if the weld breaks again you have redundancy. I would prefer to see a flat plate welded to the upright pieces (wand gussets for more lateral strength) with the bolts attached by lock nuts (no welds). Then you know you will have their full strength. A loose tire banging around the inside of the trailer can do an incredible amount of damage, so a design overkill is clearly warranted.

My Cobra trailer has this same inadequate spare tire mount, but it is not used. Instead, the tire is sitting on the floor upright, secured to the storage bin by a single large threaded rod.

Tom