Kırmızı Şimşekler is an organised supporter group associated with Düzcespor and the club’s red-and-navy terrace culture.
The group operates through a supporter association structure and is active in organised matchday support, away travel and public representation around the club.
Kırmızı Şimşekler remained clearly active in 2026. In March, the group publicly challenged the club management after a ticket dispute, and in August its association leaders visited the team before the new season and organised away support for the Ordu 1967 fixture.