On social media, McGregor has posted clips filmed in connection with the accident.
The pictures show, among other things, a broken bicycle and a motorist who looks at McGregor and apologizes several times.
A breathless and shaken McGregor also shows off scrapes on his body and torn clothes.
- I could have been dead.
Oh my God.
The bike is destroyed.
But I'm still here, thank God, that's all that matters, he says in the clips.
The Irishman also urges the driver to take it easy and not worry about the incident.
In one of the clips, the MMA star can be seen being driven home by the person in question.
"It saved my life"
“The driver couldn't see me because of the sun and hit me from behind at full speed, but my time wasn't there, thank God.
I am also grateful for my wrestling and judo training which helped me know how to land on the ground.
It saved my life," writes the 34-year-old, who in 2021 was the world's highest-paid athlete.
McGregor, still the biggest poster name in the world of MMA, has not competed since July 2021 when he suffered a severe broken leg during the grudge match with Dustin Poirier.
He then had to be carried out on a stretcher and forced to undergo surgery.
There have been rumors of a comeback in the spring or perhaps early summer.
Judging by Friday's video, the bike accident does not seem to have caused him any major injuries that would further delay the comeback.