Nankang SL1 SL-1 Medium Compound Slick Race Tyre – 240/570/13 NOT FOR ROAD USE. The Nankang SL-1 is Nankang’s first full slick tyre, developed from the ground up for serious motorsport and race use. After many years of success with the semi-slick Nankang AR-1 in various motorsport championships to the track day enthusiast, the Nankang SL-1 is everything we have learnt over the years and have put this knowledge into a completely new full slick package. Sorry, our items are NOT available for pick-up. No additional information at this time. You might also like. Nankang AS-1 Summer Tyre 255/40/19Y. Nankang AS-1 Summer Tyre 255/45/18Y. Nankang AS-1 99W 275/40R18 Road Tyre. Nankang NS2R NS-2R Semi-Slick Road/Track Tyre 255/35/18 – Drift Spec.