Is your Dad called Odin? 
No, Popeye 
I never mentioned anything about how much it could move / flex but it does flex.
The weight of a car behind that won't stop it flexing an awful lot more as we have all found out at some point.
Have a go with your front wheel with the merest rub against the kerb and report back how it went?
Exhibit A:
"Most of these rim protectors can be pushed in by your thumb so imagine what the weight of a car will be able to do".
Mighty thumb!
My wife hasn't managed to scrape the alloys on her Polo GTI yet in 17 months of driving it - PS4 generous lip. She's touched the wheel to the kerb a few times but there's about an 8mm lip and that tyre wall is pretty thick.
She'd need to bump up or down a kerb or into it at 3mph+ to deform that tyre enough to push the rubber out of the way to scrape that wheel.
Coincidentally, I managed to scrape an alloy for the first time in 9 years the other day. I swung the A4 around on an arc to park into a space on the other side of the road. I thought I'd just missed the kerb but I'd actually gone up a dropped part of the kerb and then as hooking round to straighten up must've had only a tiny portion of the wheel width up and on the kerb. As I got straight, the wheel fell.of the kerb, like falling off a cliff and scraping the side of that cliff on the way down
Felt such a clown!
Now I have the dilemma of getting all the wheels powder coated or finding 1 replacement wheel scrape-free on ebay. The wheels are silver painted with diamond cut on a small edge. Seems daft to diamond cut a wheel where painted section matches the shade of the unpainted/cut alloy so well. Will probably go with powder coating to prevent future white worm across all wheels.
