Top Gear fans might recall Jeremy Clarkson once fitting "Boudica spikes" to a Fiat Coupe as part of a unique challenge. The purpose here was to provide the little Fiat with some destructive power, but ...

Next time you’re on the highway, check out your surroundings. Take a long look at those semis, tractor-trailers, and ...

Of course, that function — keeping the threads clear — doesn't require the spike shape. If they're just to keep road salt out, why spend on manufacturing to hit this specific taper? Is there some ...