| 01.05 | |  Memorial Andrzeja Trochanowskiego | 1.2 | |
| 01.05 | |  Skive-Løbet | 1.2 | |
| 01.05 | |  Circuito del Porto - Trofeo Arvedi | 1.2 | |
| 02.05 | | Memorial Romana Sieminskiego | 1.2 | |
| 04.05 | 08.05 |  Flèche du Sud | 2.2 | |
| 04.05 | 08.05 |  Silver City's Tour of the Gila | 2.2 | |
| 04.05 | |  National Road Championships - Cyprus TT | CN | |
| 04.05 | 08.05 |  Tour d'Azerbaïdjan | 2.1 | |
| 05.05 | |  Challenge du Prince - Trophée Princier | 1.2 | |
| 05.05 | |  Dwars door de Vlaamse Ardennen | 1.2 | |
| 06.05 | 29.05 | Giro d'Italia | 2.UWT | |
| 06.05 | 08.05 | CCC Tour - Grody Piastowskie | 2.2 | |
| 07.05 | 08.05 |  Vuelta Ciclista Comunidad de Madrid | 2.1 | |
| 07.05 | | National Road Championships - Cyprus | CN | |
| 07.05 | |  Sundvolden GP | 1.2 | |
| 07.05 | |  National Road Championships - Bolivia TT | CN | |
| 07.05 | | Challenge du Prince - Trophée de l'Anniversaire | 1.2 | |
| 08.05 | | Flèche Ardennaise | 1.2 | |
| 08.05 | | Ringerike GP | 1.2 | |
| 08.05 | | Challenge du Prince - Trophée de la Maison Royale | 1.2 | |
| 08.05 | | National Road Championships - Bolivia | CN | |
| 09.05 | |  National Road Championships - Iran | CN | |
| 11.05 | 14.05 |  International Tour de Banyuwangi Ijen | 2.2 | |
| 12.05 | 15.05 |  Rhône-Alpes Isère Tour | 2.2 | |
| 13.05 | 15.05 |  1º Volta Internacional Cova da Beira | 2.1 | |
| 13.05 | 15.05 | Tour de Picardie | 2.1 | |
| 13.05 | 18.05 | Tour of Iran (Azarbaijan) | 2.1 | |
| 14.05 | |  108th Scandinavian Race in Uppsala 1909-2016 | 1.2 | |
| 14.05 | |  Ronde van Overijssel | 1.2 | |
| 14.05 | | Visegrad 4 Bicycle Race - GP Polski | 1.2 | |
| 15.05 | | Gran Premio Industrie del Marmo | 1.2 | |
| 15.05 | | Grand Prix Criquielion | 1.2 | |
| 15.05 | |  Visegrad 4 Bicycle Race - GP Czech Republic | 1.2 | |
| 18.05 | 22.05 | Baltyk - Karkonosze Tour | 2.2 | |
| 19.05 | |  Pan American Championship TT | CC | |
| 19.05 | 22.05 |  Tour of Bihor - Bellotto | 2.2 | |
| 19.05 | 23.05 | Tour de Flores | 2.2 | |
| 20.05 | 22.05 | Paris-Arras Tour | 2.2 | |
| 21.05 | 25.05 |  Tour de Tunisie | 2.2 | |
| 21.05 | |  Berner Rundfahrt / Tour de Berne | 1.2 | |
| 22.05 | | Pan American Championship | CC | |
| 22.05 | 29.05 |  An Post Rás | 2.2 | |
| 22.05 | | Omloop der Kempen | 1.2 | |
| 22.05 | | Grand Prix de la Somme | 1.1 | |
| 22.05 | |  Velothon Wales | 1.1 | |
| 22.05 | |  Kampioenschap van Singapore TT | CN | |
| 27.05 | 29.05 | Tour de Gironde | 2.2 | |
| 27.05 | | National Road Championships - USA TT | CN | |
| 27.05 | |  Horizon Park Race for Peace | 1.2 | |
| 27.05 | 28.05 |  Tour of Estonia | 2.1 | |
| 28.05 | | Horizon Park Race Maidan | 1.2 | |
| 28.05 | | National Road Championships - USA | CN | |
| 28.05 | | Grand Prix de Plumelec-Morbihan | 1.1 | |
| 29.05 | 05.06 |  Tour of Japan | 2.1 | |
| 29.05 | | Boucles de l'Aulne - Châteaulin | 1.1 | |
| 29.05 | | Horizon Park Classic | 1.2 | |
| 29.05 | | Kampioenschap van Singapore | CN | |
| 30.05 | | Winston Salem Cycling Classic | 1.1 | |
| 31.05 | 02.06 | Tour of Ukraine | 2.2 | |
Materiaalzone 
Fietstoerisme 
