Hi there! For your situation, I'd suggest going with aero bars. Aero bars are shaped like wings to cut wind noise, while square bars are usually cheaper but can howl on the highway.

I personally use the Thule WingBar Edge for Hyundai Santa Fe on my 2023. They're super quiet and look flush. On the other hand, the Yakima JetStream Crossbars with SkyLine Towers are great because the bars pop off easily when you aren't hauling bikes. I noticed about a 1-2 MPG drop, but it's worth it for the convenience! Good luck!

Curious about one thing: how much weight are you planning to haul at once? Before I give full advice, I need to know the combined weight of those mountain bikes and the loaded cargo box.

Honestly, I've had some pretty disappointing experiences with generic bars failing under stress, so I always look at safety first. For a newer Santa Fe, you really want something with a high dynamic load rating. If you're pushing the limits, I'd suggest looking at the Thule WingBar Evo 135 paired with the Thule Flush Rail Edge Foot Pack. They have a solid 165lb capacity and are much sturdier than the cheaper alternatives mentioned earlier. But yeah, if your bikes are heavy e-bikes or your camping gear is massive, we might need to look at heavy-duty setups. Let me know those weights adn I can give you a more precise recommendation!

In my experience, you don't actually need to drop $800+ on the big names to get a fantastic setup! If you're looking to stay within that $400-$600 budget while keeping things sleek, I absolutely love the Yakima JetStream Internal Woodsman Crossbars. They are amazingly quiet on the highway, and honestly, I barely noticed a 1-2 MPG dip on my own Santa Fe.

Another solid value play is the Turtle Air2 Roof Rack Cross Bars for Hyundai Santa Fe. They have a super low profile that looks factory-installed and they're a breeze to take off when summer ends.

Quick tip: definitely grab a Thule AirRoad Wind Diffuser Strip if you notice any whistling—it's a cheap fix! Just make sure to double-check your rail type before ordering. Anyway, back to your question, either of these will handle your bikes and cargo box without breaking the bank. Good luck with the adventures!

Curious about one thing: what's the exact year of your Santa Fe? I've been through a few of these setups over the last decade and learned the hard way that the flush rail design actually changed slightly between certain model years, which can really affect how much the crossbars whistle at high speeds. Also, are you planning on leaving the bike trays mounted, or do you want the whole system to be quick-release?

Saw this earlier and had to jump in because people always overlook the small stuff. Ive been doing this for years and seen too many racks fail.

• Like someone mentioned, the rail design changes based on the year, so be careful. Are you planning on taking this thing off-road or just sticking to the highway? If youre hitting washboard roads, you gotta be way more picky about the mounting hardware.
• Honestly, just go to YouTube and search for Santa Fe roof rack wind noise tests. There are some really detailed videos that show the exact decibel levels for different brands.
• You should really just check the official fitment guides on the brand websites. They have the most up-to-date info on weight limits and clearances for your specific trim. Dont just take our word for it here... do the research on the official sites first and check Reddit too.