Peaty's Tubeless Conversion Kit. Features: Includes everything a rider needs for a fully optimised tubeless setup Includes one 9m roll of dual layer high tensile strength rim tape, two 120ml trail pouches of Holeshot BioFibre tubeless tire sealant and a pair of black tubeless valves (60mm for 21mm road/gravel and 42mm on the other widths) Specs: Description:Holeshot tubeless conversion kit, 21mm Includes:2x120ml sealant, 1x9m rim tape, 2x60mm valves