Has anyone used these, and if so are they ok for SUP boards? They're so cheap compared to other brands.

my previous racks got stolen (seriously) and I have a set of soft ones, but the convenience of hard racks is undeniable, as long as they don't fail!

www.bunnings.com.au/universal-car-roof-rack-cross-bars-90cm-aluminium-adjustable-lockable-45kg-clamps_p0369559?gad_source=1&gbraid=0AAAAADtbEB8-zJ0V48EAAIqeu0FXkymHO&gclid=Cj0KCQjwvpy5BhDTARIsAHSilym4_ODBNuYWRccF2AHYMH0nUIDxlDVZvrndrAvr4qPx6TbeqV-qUBQaAs5mEALw_wcB&gclsrc=aw.ds

I haven't used these, but the reviews are not great.
While considerably more expensive, it's hard to go past the 'model specific' units out there (re: prorack).
And while still more than the Bunnings ones, I did cut corners for my sons car. Bought a set of proracks for the bars off marketplace for not much, then went and bought the model specific mounting kit. Saved a bit of coin doing it this way.

The speed limitation noted by a few of the Bunnings reviews is a big red flag, especially with the wing that a SUP will create up there.

Get decent racks n tiedowns if your going to travel any distance at speed. And don't forget to add the overtaking B quad Roadtrains added wind factor
Just a thought....
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Is this you

Decent bars , tiedowns and Lockraks are inexpensive peace of mind in the long run.
We frequently traveled between Vic and NT hassel free..*&