Factor leaps on UCI rule change with new Ostro VAM aero bike

The new Ostro VAM's super skinny seatpost was made possible by "recent changes to the UCI regulations regarding minimum profile thickness"

New Factor Ostro VAM
(Image credit: Factor)

After breaking cover at the 2024 Santos Tour Down Under and clinching a general classification win under Stevie Williams, this launch isn’t exactly a surprise. We’ve already clocked the tweaks to the head tube, forks and seat tube - but now come the details: how much faster? How much lighter? And just how does the Ostro VAM stack up against the competition?

These questions encompass pretty much exactly what this update has focused on - and has taken advantage of the UCI's relaxation of its rules on minimum tube profiles (more detail on that further down). 

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Stefan Abram
Tech features editor

After winning the 2019 National Single-Speed Cross-Country Mountain Biking Championships and claiming the plushie unicorn (true story), Stefan swapped the flat-bars for drop-bars and has never looked back. 

Since then, he’s earnt his 2ⁿᵈ cat racing licence in his first season racing as a third, completed the South Downs Double in under 20 hours and Everested in under 12.

But his favourite rides are multiday bikepacking trips, with all the huge amount of cycling tech and long days spent exploring new roads and trails - as well as histories and cultures. Most recently, he’s spent two weeks riding from Budapest into the mountains of Slovakia

Height: 177cm

Weight: 67–69kg