The "Tioga Faster X S Spec" refers to a high-performance BMX race tire by Tioga, known for its balance of speed and control thanks to its "GripPod" technology and "Nano Knob" tread design; it features a lightweight 120 TPI casing and is considered a versatile option for both front and rear use on a BMX bike, available in various sizes like 20x1.75, 20x1.60, and 20x1-3/8"