The Syerra G2. 0 4C DownCountry Tire raises the bar of what a XC tire can do, and it features high grip and resistance to make for a lightweight and fast construction for all-day fun. It can tackle the burliest descents and the most rugged terrain, and it features safety and sidewall protection ensured by the anti-pinch flat insert. High durability and speed come thanks to Graphene and four different kinds of compounds.