I was amazed to see how my car's tire started attracting the nuts and bolts, how in the world did it induce the magnetic field? Never heard of such phenomena!!!
[Physics] How does the magnetic field get induced in car’s tire
electromagnetismelectrostaticseveryday-lifemagnetic fields
Best Answer
Car tyres, which these days are almost always radials, are sometimes reinforced with steel. It may be possible that these have become magnetized due to impact in the Earth's field, although I find that unlikely unless you constantly drive in one direction.
Otherwise, maybe someone has run a magnet over your tyres?
Adding quotes from another paper on the subject