Porsche Semi-slick tire distributor Type: Nankang CRS Designed for tracks and also for daily use It has the same specifications as the Pirelli Trofeo RS, competes with it, and its price is much lower. Tires are available for 17, 18, 19, 20, and 21 inch rims. For purchase orders, click on the word 'Contact' below, and the phone number will appear.