RT @fietsprofessor: 'In flux' versus 'Inertia' https://t.co/tWZ9TlYnhS :: Cowlibob

RT @fietsprofessor: ‘In flux’ versus ‘Inertia’ https://t.co/tWZ9TlYnhS

2016-10-27

‘In flux’
versus
'Inertia’ [pic.twitter.com/tWZ9TlYnh...](http://pic.twitter.com/tWZ9TlYnhS)
— Cycling Professor (@fietsprofessor) October 6, 2016

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