Thank you for tha compliment, but actually, those are just modern style spinner-rims.
"Knock off" wheels have a central device on a threaded axle, that is the sole item holding the wheels on. That device usually had 3 blades, though 2-blade knock offs were also around. You unscrew them by "knocking them off" with a rubber or wooden mallet (also that's roughly how you mount them)
They were used a lot on sport cars in earlier days of auto racing for quick wheel removal. AC Cobras and Ferraris had them.
Nowadays, you just see simulated bolt-on knock-off wheels with a fake knock-off center cap in the middle.
Here's a webpage showing some REAL knock-off wheels that use an adapter for usage on regular 4 and 5 lug axles......
TRIVIA: If you have ever seen the James Bond movie called GOLDFINGER, you might recall his Aston Martin that had devices that resembled knock-offs on his wheels, which could project outwards to slice the tires of rivals, bad guys (and pretty ladies in the movie)