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CyclingTips on Twitter: "Think the idea of a hidden motor inside a road bike is ridiculous? Think again: http://t.co/s8TnX8cFW2 http://t.co/o6o8hVqjhY" / X
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Mechanical doping: All you need to know about concealed motors | road.cc
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Riding a bike with a hidden motor | Road Bike, Cycling Forums
What is it really like to ride a bike with a hidden motor? (video) | Cycling Weekly