The challenging climbs on the road course, rated one of the most demanding ever, put paid to Kiwi chances on the first day of road races at the world road cycling championships in Italy today.
National champion James Oram held on until the final of seven laps before succumbing to the hilly course, finishing 52nd in the men's under-23 race in Tuscany.
The 173km race, comprising seven circuits with nearly one-third spent on the climbs, had earlier taken the toll of fellow New Zealander riders Dion Smith and Alex Frame.
Teenagers Devon Hiley and Madison Campbell faced the same fate as the gruelling hills proved too much in the junior women's race, with both failing to finish.
Oram, who is racing with the Bontrager development team based in USA this year, had sat in the bunch as the big peloton rode down an early break that had pushed to a three minute 30 seconds advantage.