During the 1938 racing season Meier, rode a BMW RS 255 Kompressor in both European and German Championships. For the 1938 Isle of Man TT, Meier was entered by the BMW team along with Jock West and Karl Gall. The BMW team suffered setbacks when Karl Gall was injured in a crash during an unofficial practice, was found in a ditch above the Gooseneck, and was unable to race. On the startline for the 1938 Senior TT Race, one of the BMW mechanics stripped a cylinder-head thread during a spark plug change on the engine of Meier's Type 255 machine. Trying to start the 1938 Senior race on one cylinder, Meier soon retired on lap one at the bottom of Bray Hill. The race was won Harold Daniell riding for Norton at an average race speed of 89.11 mph and Jock West riding the works supercharged BMW finished in 5th place at an average race speed of 85.92 mph. In 1938, Meier went on to win the 500 cc Belgium Grand Prix at Spa-Francorchamps, the 500 cc Dutch TT, the German Grand Prix at the Hohenstein-Ernstthal (or Sachsenring) road course and the Italian Grand Prix at Monza. The 500 cc 1938 Ulster Grand Prix was won by BMW teammate Jock West and Meier became the 1938 500 cc European Motor-Cycle Champion.