Vittoria Rubino Pro Speed G Road Tire. If riding fast is your primary mission then the Vittoria Rubino Pro Speed G road tire belongs on your bike. Vittoria has utilized a variety of technologies that trim this tire down to a bare minimum of weight while maximizing its performance on the road. First and foremost is the utilization of Graphene represented by the G in the tire's name. The Graphene in Vittoria's G Isotech tread compound is a nearly transparent sheet of pure carbon mere atoms thick. Prior to the development of Graphene, there was always the limitation of choosing between optimizing for speed, grip, and durability. Effectively, the introduction of Graphene allows for natural material barriers of rubber to be removed, which means that there is no longer the need for such compromises between speed, grip, and durability. All these features now co exist in a single, Rubino Pro Speed G tire. Additionally, the Rubino Pro Speed G features Vittoria's 3 Compounds 3C technology which is a layering process that uses three separate compounds in the same tread. The 3C process combines three compounds for speed, grip, as well as suppleness. Featuring a 180 TPI nylon casing, the Rubino Pro Speed takes advantage of the material's minimal weight to help keep the gram count low while still providing strength and suppleness. All of this adds up to a feather light tire a mere 180 grams for 700x23 that ensures a competitive edge.