Assuming you have a Lippert frame:
I've been going through a similar exercise of figuring out bike storage on my x-lite travel trailer. For those who might come after me, I have some bits of clarification.
First, get your your Lippert S/N or Item# off of the sticker on your unit's frame.
Second, call Lippert parts or tech support at 866-524-7821.
They will tell you about your frame, the width between beams, the weight load bear of existing bumper, etc. They can also suggest bike or storage options that will work for your frame dimensions and strength.
My BHXL201 bumper is rated for 100 lbs max. So with our spare tire on the bumper, it limits anything in addition.
Finally, I have seen references in another thread regarding weight bearing load of different rear sliding or flip down bike/tire storage options. The official weight load that I have seen documented depends on the storage option and the width of your frame beams. Note that below appears to suggest that the fold down bike rack is only installed on 10" beams. That is something to verify, I don't know if there is flexibility to install on 6" beams like my travel trailer or not.
https://www.lci1.com/assets/content/...9;s-Manual.pdf
From Lippert: Bike Rack Weight Ratings
Lippert bike racks and tire carriers are weight rated based on the height of the main rail tube. Weight ratings for pull-out and fold-down bike racks are as follows:
Pull-out bike rack on 4"- 6" main rail tube - 150 lb.
Pull-out bike rack on 8" I-Beam main rail - 200 lb.
Fold-down bike rack on 10" main rail tube - 250 lb.