As the name suggests, tire wear bars are designed as visual indicators ... When the treads become thinner over time, their grip on the road is significantly reduced, causing you to lose control ...

Grooves reveal more of Lincoln's head as tires wear; wet-weather grip declines long before the top is visible. Gauging wear. A tread-depth gauge shows wear more precisely. Wear bars approach the ...

The claims. Tyre Grip creates a "better grip on snow, ice, and slush" by providing "an adhesive surface that grips the roads." You spray it on tires, and it's supposed to work for up to 50 miles ...