I installed the Draw-Tite Class I on my Bolt LT. It's a 1-1/4" receiver rated for 200/2,000 lb loads.This is exactly my worry. The OP had a different hitch (Torklift) and a picture holding three bikes on rack.
The Curt seems to have the least support of the three hitches I know about (Curt, Torklift, and Draw-Tite). I believe I read that some of the first Curt only were rated for 100lbs, instead of the more standard 200lbs rating for Class 1.
Does the OP have more time/experience hauling three bikes?
Can anyone comment on the quality/strength of the different hitches?
Two reasons I selected this product:
1. Ease of installation - No bumper parts need to be removed. Just unfasten the forward edge of the under-bumper trim panel for easier access.
2. The receiver mounts to the lower bumper bolts AND the underbody framework. To me, that is a sturdier way to support the up-down loads on the hitch (tongue weight) as opposed to only using the bumper mount bolts.
This setup works very well for towing my Waverunner. I would think it would work just as well for the bike racks since it would tend to brace better against the "bike bounce".