The International Wheelset Congress is the oldest railway technical konference in the world. With two exceptions, this event has been held every three years.
Overview of all IWCs:
| 1. | 1963 | ... Bergamo, Italy |
| 2. | 1966 | ... Munich, Germany |
| 3. | 1969 | ... Sheffield, England |
| 4. | 1972 | ... Paris, France |
| 5. | 1975 | ... Tokyo, Japan |
| 6. | 1978 | ... Colorado Springs, USA |
| 7. | 1981 | ... Vienna, Austria |
| 8. | 1984 | ... Madrid, Spain |
| 9. | 1988 | ... Montreal, Canada |
| 10. | 1992 | ... Sydney, Australia |
| 11. | 1995 | ... Paris, France |
| 12. | 1998 | ... Qingdao, China |
| 13. | 2001 | ... Rome, Italy |
| 14. | 2004 | ... Orlando, USA |
| 15. | 2007 | ... Prague, Czech Republic |