I’d imagine someone makes a 1.25” hitch for a bike rack for my cars…hitches aren’t generally hard to install or costly, especially when wiring isn’t necessary and the 1.25 isn’t as unsightly as the more standard 2”. It just takes a bit more time to find a 1.25 bike rack hitch for mine and kids' bikes (got them here). There’s less “quality” options. I know a guy who makes a pretty cheap one that, while not highend, it’s built well enough.