Designed for maximum traction on crushed gravel and hard dirt, the Addix Performance line 26 x 2.1" Billy Bonkers Mountain Tire features a playful and agile tread design that allows for quick rolling. The divided blocks of the tread help to increase gripping edges, while small ramps in the middle provide a faster roll-off and a forgiving landing for riders. This tire is perfect for those unexpected moments in the air.