TIOGA FASTR X 20x1.85 WIRE BLACKLow profile race tire with ultra smooth centerline and pressure sensitive side tread that increases corner traction when pushed to the limits Special chemical surface etching applied to center tread creates fine surface texture that enhance traction on wider variety of track surfaces Nano knobs in varying angles, shapes, and sizes strategically integrated within the outer tread zones provide additionaltraction on track surfaces with loose fine grains