New 6.3kg Factor O2 VAM review: This, Tarmac SL8 or Aethos?

My review of the stunningly lightweight Factor O2 VAM based on several months riding on my favourite roads and climbs. Is lighter really better and how does it compare to the also lightweight Tarmac SL8?

Content
00:00 Intro
00:28 How is it so light?
3:06 Is it stiffer and more aero?
5:03 How much does it cost?
6:13 How does it ride and climb?
11:15 Is it comfortable as well?
12:22 Is Lighter better then?
13:33 Should you buy it?

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