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http://www.geeky-gadgets.com/powerwheel ... 9-09-2011/
$1200 to make you bike less efficient.
I think I invented something similar at a much lower cost, which I called 'Knackered Wheel Bearings'
$1200 to make you bike less efficient.
I think I invented something similar at a much lower cost, which I called 'Knackered Wheel Bearings'