The World’s Lightest Production Bike Is an Engineering Marvel At a Discount Price

The XDS X-Lab RT9 is lighter and cheaper than Specialized Aethos and other recent super lightweight climbing bikes. But is it any good?

00:00 - Intro
00:14 - Riding Impressions
04:43 - The details
07:30 - More riding impressions
09:30 - The only real problem

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