hmmm mine doesn't move at 100+Mph.I use the Ogio also, with the magnets. It's my go-to for short rides and so convenient - just lift it off and go. But... I have had issues with it staying put at higher speeds, above 120kph. I don't ride that fast generally, but when overtaking a truck on an outback road, sometimes there's not much choice but to hook it, and I have to quickly adjust the tank bag before it slides off too far.
You profile pic shows a Fly screen, maybe that's enough to direct some of the wind over the tank bag?hmmm mine doesn't move at 100+Mph.
I don't always use the windscreen - maybe you have gloss paint and it makes it slide more than the matte green on mine? I have no clue but its pretty stable - sometimes you have to wiggle the magnets in their little pouch out to the ends to make sure they make good contact, but zero issues for meYou profile pic shows a Fly screen, maybe that's enough to direct some of the wind over the tank bag?