RAIL Designed for speed on smoother trails and drier conditions, the Rail excels in both and is fast on the tarmac too. Close spacing of the center tread makes for swift progress, while aggressive shoulder tread gives you the confidence to let rip on the loose stuff. The rail is available for mountain bikes and gravel bikes. Everything about the Rail was designed for speed. From the specialty center and transition knobs for lower rolling resistance to the tapered cornering knobs for agile maneuverability, this tire offers a fast ride. Great gravel tires that roll quickly and bite in the corners Road.cc Specs Size 700x40c 45-85 psi Compound - MPC Weight 710 grams Color - Tan Walls (for hook'd rims only!)