well yeah they check the tires, but would they have any reason to even look at the tire size and see if the MC letters are there?
I'm sure they look at the treads and look for a bead that came off.
I tried to goggle accidents caused by car tires on motorcycles, and I could not find any kind of reports of 'wrong tires' being a classification.
Just by shear chance there must have been some people that have crashed with car tires on their bikes. Where is that information?
I am a retired police officer, spent 13 years in traffic homicide, the reason you don't find information on car tires on motorcycles in crashes is because a normal crash report does not capture that information, even the traffic homicide report while it captures more tire information does not break it down as to if it is a car tire being used.
You were correct in your other post about the beads on car rims and motorcycle rims being different sizes, that was done to discourage the use of car tires on motorcycles, yes it was done on purpose.
This double dark side is where you put a rear motorcycle tire on the front running it in reverse rotation of the arrow, that is not a good idea either because of how the belts in the rear tire are designed, running the tire against the rotation arrow or backwards can result in the belts coming apart.
Again crash reports don't capture that data nor do traffic homicide reports.
A car tire is not designed to roll up onto its shoulder, where a motorcycle tire is designed to do that, that is why a motorcycle tire is curved.
Notice the only bikes you see running car tires outside of custom choppers with huge tires are large cruisers and touring bikes. How many have been involved in crashes, crashes with injuries and fatal crashes is unknown again because that information is not collected and tracked on the crash reports.
All they do on a traffic homicide report is document the brand, size and air pressure if not flat and the tread depth. No where on the reports does is ask is it is the proper tire for the vehicle/motorcycle.
The percentage of people running car tires on motorcycles is small so any sample size would be small as well.
One of the claims dark siders push is car tires provide better traction but if that was the case whey don't motorcycle makers install car tires from the factory? They would actually save money on the cost of the bike as car tires are much cheaper than motorcycle tires so that would mean more profit in their pockets yet they don't do that for a reason, one the rim beads are not compatible no matter if people are forcing car tires on motorcycle rims or not. Two the bikes are designed for motorcycle tires because motorcycle tires are designed to lean and still provide traction.
Car tires are not designed to be leaned, the cruiser and touring bike people are getting away with it only because they can't push it to the limit like a sport bike can and you never see car tires on sport bikes.
I know I am wasting my time but installing car tires on motorcycles is not smart.