With the Simson Valve Adapter Schrader a tire with an ATB valve (Schrader valve) can be inflated with an ordinary bicycle pump. The Simson valve adapter is made of brass for optimum service life. Turn the valve adapter on the ATB valve, after which the tire can be inflated with an ordinary bicycle pump. Remove the valve adapter after inflation from the valve. The Simson Valve Adapters Schrader are supplied per two pieces.