[special-K]

I'd inquire about that hubcap mounting. From my experience the hubcap type/size is all about the bolt pattern and not rim diameter. That Blazer you showed, I believe, has 16.5s going by the larger diameter and lower vs lower profile tire. They definitely aren't 15" wheels and those are definitely 1/2t hubcaps. My guess is those are 8.75 - 16.5 tires on stock width (6.75) wheels

Speaking of trailer wheels, I put 15" steelies and hubcaps on my 5x10 utility trailer. 5 x 4.5 lug pattern is hard to find in a car wheel. Ford only put 15" wheels with that pattern on 49-52s before dropping to 14" as low-slung turnpike cruisers came along. Mopar ran 15s later on, but they use a smaller diameter hubcap and mounting circle. So I found a pair of 49-52 Ford wheels. Then I had a tire go down fast due to inner sidewall in contact with a bolt shank, ruined that rim. I picked up a Mopar 15" so now run a LUV hubcap on that side. 4.5" bolt pattern is the only place I've seen two hubcap sizes for and that is only Mopar doing their own thing. Dexter makes the wheels I need to run my 1/2t Squarebody hubcaps and use my remaining 49-52 as a spare. Except.... I've decided I really like the painted LUV hubcap on there. They remind me of back in the day when campers and boat trailers came with their own hubcaps, only with a Chevy bowtie