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Not all gravel roads are created equal. The Teravail Cannonball Tire is made for the nasty stuff. With an intentional tread design, sidewall slicing, razor-sharp flint stands no chance against the Cannonball. It comes as no surprise that the Teravail Cannonball is the official tire of the Dirty Kanza 200. The race covers 200 grueling miles over the flint hills of Kansas and is widely considered one of the premier gravel events in all cycling. It was prototyped along this course and the end result is incredible. We know you will love and more importantly respect the Teravail Cannonball.