Panaracer GravelKing X1 R Tire - 700 x 45, Tubeless, Folding, Black/AmberWhen speed and precise handling are essential for the race or ride, the X1 R delivers with its unique casing and race tuned technology, ensuring you roll to your optimal finish. Ideal for gravel, dirt, and rough pavement TuffTex R provides bead to bead protection that represents Panaracer s most supple and lightweight casing to date. This distinctive combination guarantees an exceptionally smooth ride, providing the lowest rolling resistance available