While driving, you may occasionally notice protruding spike-like lug nut covers on the wheels of tractor-trailers. While usually made of plastic, these spikes may also be made of aluminum or metal. One hazard is that these spikes may extend out too far from the outer edge of the rim of the wheel and come into contact with other vehicles, including motorcyclists and bicyclists, or even pedestrians.
As I previously discussed in a prior blog post, nearly half of bicyclists and one quarter of pedestrians who are killed by a large truck first impact the side of the truck. It is easy to see the increased danger of side impacts if the bicyclist, motorcyclist, or pedestrian makes contact with a wheel’s spikes.