Another 10 percent had at least one bald tire. Worn tires—especially bald ones—can be deadly on wet roads, where the grooves aren't deep enough to channel water out from beneath the tread.

Driving a car with faulty equipment, such as bald tires, can increase your risk of causing an accident. Your insurance company can deny your claim, citing negligence.

Driving a vehicle with bald, damaged, or underinflated tires is dangerous and can lead to traffic accidents. Faulty tires can cause blow-outs, which can lead to crashes.

Skidding and a loss of traction are just two of the things that can go wrong when your bike's tires are worn down, putting ...