Smoothest hub...China vs USA

This testing is subjective to many conditions and is not laboratory accurate,yet simply illustrates what home-made testing can reveal. Try it for your self.
Handy References : Hub resistance by Bill Mould : https://www.youtube.com/watch?v=MFyEd5zYLy4

Tyre resistance: http://nyvelocity.com/articles/equipment/crr-explained/

http://www.engineeringtoolbox.com/rolling-friction-resistance-d_1303.html

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