Wheel flying off Crazy Driver's car is NOT necessarily a movie mistake.
Okay, there has been a lot of picking at this great Eastwood/Bridges classic. Some justified (like the dummy in the Riveria or the camera on the hood of the Trans Am) but some of it is not 100% fair or even rational. For instance the wheel obviously flying off the Crazy Driver's car as it flips over. Later Thunderbolt and Lightfoot are driving the damaged car and the wheel is back on the car. I say to that, SO WHAT!?!?
The car lost it's wheel in the roll over, NOT an axle, NOT a wheel bearing, NOT a rear-end, but a simple wheel with tire. It isn't far fetched to believe the car had a factory bumper jack mounted in the trunk, especially since the car was fairly new (it's a 1973 Plymouth Fury coupe). Who is to say Thunderbolt and Lightfoot didn't take the jack from the trunk, jack up the car and simply put the wheel back on? They wouldn't even need to look for lost lug nuts on the ground as they could simply take one lug nut from each of the three other wheels and use them. Five lug bolt pattern cars can drive with only 3 tightened lug nuts on one wheel and 4 on the other three is still rather safe so long as they are tightened. A smart audience doesn't need to see Thunderbolt and Lightfoot actually place the tire on the car to believe this as it's not irrational to think. Just like we don't need to see where Thunderbolt got the safe dials, keys to the bar bathroom's padlocked window or whether or not Lightfoot's leather pants are actually in the bundle of clothes he carries.
There have been other, easily explainable nit-picks and questions over things in this film posted here on this board that are really easily explained but oh well. For example, I'm surprised no one has questioned why the car salesman had the keys already in the Trans Am's ignition at the used car lot, even though it used to be a very common practice.
"I don't want your watch, man. I want your friendship!"
- Lightfoot