American cycling sensation Taylor Phinney has placed doubt on his participation in the maiden omnium event at the London 2012 Olympics.
The 20-year-old is the reigning world champion in the multi-race event and was expected to make it his focus in London after the pursuit, in which he is the two-time world champion, was scrapped after the 2008 Beijing Games.
However Phinney, who on Wednesday won the under-23 individual time trial gold at the world road race cycling championships, says his blossoming road racing career has forced him to reconsider.
"I had a lot of passion for the individual pursuit, but now it's no longer on the programme. We'll see (about the omnium)," Phinney said after his gold win.
"I plan to do some track (racing) this winter. Track is good, but I'm lacking the passion that I'm now starting to have for the road and time trialling."
Phinney signed his first road pro contract last week with American-Swiss team BMC, which is home to Australia's defending world champion Cadel Evans and American veteran George Hincapie.
The 20-year-old from Colorado said he would jump at the chance to help Hincapie, whose career dream has been to win Paris-Roubaix, on the treacherous cobbles of northern France in 2011.
"I'm really looking forward to my first year with BMC. I don't know what to expect. It's going to be exciting if I get to race Paris-Roubaix next year with George," said Phinney, who won the under-23 version of the gruelling classic in 2009.
"But at the moment I'm taking things one year at a time."