WTB Nano 700c Tire. Features: 700c version of the tried and true Nano tread, and excellent choice for your Gravel or Cross bike A 40mm rounded profile and an elevated centerline provide enough volume for lower tire pressures and a smoother ride while still reducing drag and rolling resistance TCS Light: light, supple and compliant, sealant ready FR: fast rolling, with WTB's Dual DNA rubber compound that optimizes efficiency, traction and durability. A firm, long-wearing centerline tread with softer side knobs Race: DNA rubber (fast rolling, long wearing, high traction compound), lightweight casing and folding bead Comp: durable 27tpi casing, wire bead, standard compound Specs: Model:700c Comp Width:40c Compound:standard Bead:non-folding Color:black Weight:550g