Men and women will race together for their nations for the first time in the 2019 Road World Championships in Yorkshire.
The team time-trial mixed relay is being introduced as part of a drive to "encourage gender equality".
UCI president David Lappartient said the new event was designed to "increase the attractiveness" of cycling.
The Worlds, including a Para-cycling race for the first time, are on 21-29 September.
However, the full Para-cycling Road World Championships will take place the previous week in the Netherlands.
All Road World Championships races will finish in Harrogate.
The new mixed relay race will feature three men and three women competing for national teams.
"We have pledged to deliver an inclusive, innovative and inspiring World Championships," Yorkshire 2019 chairman Chris Pilling said.
"We are therefore enormously excited to be the first host to integrate Para-cycling into the programme."
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