Overview of the number of competitors per nation. Note that for races with a long history this statistic will be incomplete as historical starting lists are not always complete.
| Pos. | Nation | #Different riders |
|---|---|---|
| 1 | Italy | 38 |
| 2 | Belgium | 34 |
| 3 | Netherlands | 25 |
| 4 | Germany | 23 |
| 5 | Spain | 20 |
| 6 | France | 20 |
| 7 | Australia | 14 |
| 8 | Denmark | 9 |
| 9 | United States | 9 |
| 10 | Great Britain | 9 |
| 11 | Switzerland | 8 |
| 12 | Colombia | 8 |
| 13 | South Africa | 8 |
| 14 | Slovenia | 7 |
| 15 | Czech Republic | 5 |
| 16 | Russia | 5 |
| 17 | Japan | 4 |
| 18 | Portugal | 4 |
| 19 | Kazakhstan | 4 |
| 20 | Norway | 4 |
| 21 | New Zealand | 4 |
| 22 | Eritrea | 4 |
| 23 | Austria | 4 |
| 24 | Poland | 3 |
| 25 | Ireland | 3 |
| 26 | Canada | 2 |
| 27 | Slovakia | 2 |
| 28 | Israel | 2 |
| 29 | Croatia | 1 |
| 30 | Ukraine | 1 |
| 31 | Costa Rica | 1 |
| 32 | Ecuador | 1 |
| 33 | United Arab Emirates | 1 |
| 34 | Estonia | 1 |
| 35 | China | 1 |
| 36 | Uruguay | 1 |
| 37 | Argentina | 1 |
| 38 | Luxembourg | 1 |
| 39 | Belarus | 1 |
| 40 | Taiwan | 1 |
| 41 | Sweden | 1 |
| 42 | Latvia | 1 |