Australian cyclist Bridie O'Donnell has broken the women's world hour record, riding 46.882km.
The 41-year-old broke the mark of 46.273km, set last September by American Molly Shaffer Van Houweling.
O'Donnell, the Australian 2008 road time trial champion, set the record on Friday night at Adelaide's Superdrome.
With UCI president Brian Cookson looking on, O'Donnell produced a masterpiece of consistency.
She needed a schedule of 19.45 seconds per lap and she never deviated from around 19.1 to 19.3.
The old mark was just over 185 laps and she was on target throughout - 62 laps at 20 minutes and 124 laps at 124 minutes.
O'Donnell had been preparing the record attempt for 12 months.
"I can't believe I broke a world record," an emotional O'Donnell said.
O'Donnell is the first Australian woman to hold the mark since Anna Wilson briefly broke it in 2000 with 43.501.
Compatriot Rohan Dennis also held the men's world hour record last year.