The Scorpion lineup dates to 1998, when the brand introduced the Scorpion Mud, a knobby tire designed for tough terrain and off-road-only vehicles, not road use.

Last year, Ford recalled its short-lived off-roady Transit Trail van, replacing its original aggressive all-terrain tires with smaller ones because the knobby tires rubbed the body. Now, according ...

Motocross bikes and dirt bikes in general use tube-type off-road knobby tires commonly inflated to 12 to 15 psi. These knobby tires come in a wide range of side-wall stiffness ratings and tread ...

But that’s not what I’m hinting at. Rather, it made me realize I could stretch its capabilities with a simple switch between knobby tires for the trails and slick performance tires for the ...