QiK VMAX Ultra-High Volume Presta Tubeless Valve Stems - Road, MTB, Convertor Valve, Sealant Injector KitVMAX values Vmax valves deliver 300% more volume, enabling tires to be seated with a floor pump and Tubeless Sealants can be added removed directly through the valve. Sold 2 per set 3 options are available, MTB (robust) Road (light) and a Convertor that enables consumers to use existing valve stem CO2 Cartridge Inflator Adapters for VMAX or Regular Valves with Multi Shot Function: Precise control of air flow twist to inflate twist opposite to seal. On