The 651 Sport just got even better. With the introduction of the 651 Sport XTRA (the 100tw version of the 651 Sport) Accelera has stepped up their game. How, you ask? They just made one of the most durable and long lasting tires on the market even grippier. Imagine the lifespan of a 100tw tire made by the hands of Accelera. Pretty unbelievable, we know. So let us give you the rundown!