WTB Tire Bailiff 4.5 x 27.5 cale 120tpi TCS Light/FR DNA black27. 5 cale fat bike tire, developed for snow, ice, mud and sand Widely spaced knobs for improved braking and cornering traction on packed snow Available with or without carbide studs pre installed, both versions feature 312 stud pockets for unbeatable traction on ice Tubeless ready 120 tpi casing provides a supple ride feel and conforms to all surface conditions Snow specific rubber compounds that remain soft and flexible even in extremely cold