Vittoria rubino pro speed g road tyreas the fastest and lightest tyre in the range the pro speed g is the ideal choice for racing and fast paced training using graphene a revolutionary substance thats only 1 atom thick but 200 times harder than steel and the lightest material known to man the rubino pro speed g has it alla mix of three compounds gives the best combination of speed grip and suppleness the rubino pro speed g is suitable for all weather conditions providing excellent