The bontrager 2013 r2 700c folding clincher road tyre combines the proven ride quality and construction of the r1 with aero wing technology their unique aero wing design improves airflow where the tire meets the rim so you use less energy to ride faster featuring a light and durable 60 tpi casing along with integrated sub tread puncture protection hard case lite available in five dual tread colour options covered by bontragers unconditional performance guarantee