|Competitor for West Germany|
|World Cup Championships|
|Bronze||1972 Königssee||Men's doubles|
|Bronze||1977 Königssee||Men's doubles|
His best overall Luge World Cup finish was third in men's doubles in the 1977-8 inaugural season.
After retiring from luge, Grosswang formed Rudi Grosswang Services (RGS), a marketing firm in Germany that has been involved in the marketing of the International Luge Federation (FIL) since the mid-1990s. This includes partnering with FIL's longtime sponsors Viessmann and Eberspäacher.
- 1976 Winter Olympic men's doubles results.
- FIL-Luge news on Grosswang's 60th birthday in 2007 and his marketing firm
- List of European luge champions (German)
- List of men's doubles luge World Cup champions since 1978.
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