8 in. L Add on Garage Storage Hooks (4-Pack)

Yes

It fits the specific shelving also purchased at Home Depot. It hangs down about 3-4 inches . It may not work on other shelving due to the dimensions of the wiring grid. The hooks are made for this specific shelving.

Yes they do.

Without taking my bikes down off the hooks to measure it looks to be 5 3/4" vertical from the 2 U bends, the horizontal is 4", and the small end vertical where you put your tire into is 1 1/2" vertical.

They're pretty solid, I have my 25lb Road bike on it with accessories including the heavy bike lock and there's no issues. I don't know the capacity limit or recall if there was any documented but from the looks of the hooks I suspect they could easily hold 50 lbs or more as the weight is distributed between the two hooks and absorbed by the Hyloft. Rather than worrying about the weight of the bikes on the hikes I'd be more worried about breaching the capacity of the Hyloft itself if you have heavy stuff being held in storage on it; in my case I have mostly light weight stuff up top so I'm not worried about the bike weights on it.

Good question, my Road bike weighs more than 25 lbs but I don't hang it on a single hook. I have no weight issues hanging it using 2 hooks and I have all my accessories on the bike which include a heavy bike lock wrapped around the seat post. I'm attaching the picture of the 2 road bikes I hang in my garage with these hooks.

Should be, from what I can tell the squares on all the Hyloft units are the same size with the only difference being how many are on any given unit based on the sizing. I bought my hyloft a long time back and it has a size range that can be setup but I don't recall the size range I have. If your squares are 4" then you're fine with these hooks as that's what mine are on my unit.

If your Shelf Wall storage has a similar 4" square hook like what's seen in the photo and typical for hyloft's then I would say Yes but keep in mind there may be a weight capacity on a single hook to consider as well as potential impacts to the Shelf Wall Storage unit from whatever you hang from the bike hook. If you see in their photo the upper hook needs a 4" square to hook onto in order to secure the hook otherwise it won't fit or would be loose and move around if it's less than 4"

I bought these Hyloft hooks and they definitely DO NOT fit my SafeRack!