Emergency services were called to Norwell Lane, Cromwell, Newark, at around 6.40pm on Saturday 10 June 2023.
Serious collision investigators believe the two riders pictured were travelling along the same road at a similar time to that of the deceased prior to the collision.
Investigator Georgina Luke, of Nottinghamshire Police’s Serious Collision Investigation Unit, said: “These two riders are being sought as witnesses, and may hold valuable information that can assist the investigation team.
“If you are one of these people or you recognise them from the bike then please get in touch with us as soon as possible.”
Anyone with any information is asked to call 101, quoting incident number 635 of 10 June 2023, or alternatively call Crimestoppers anonymously on 0800 555 111.
