The largest rideable bicycle has a wheel diameter of 3.3 m (10 ft 9.92 in) and was built by Didi Senft from Germany
On a bicycle, you can travel three times faster than you can walk, for the same amount of energy. No other living thing can expend so little energy for so much self-powered travel!
A bit of cycling science for you: amazingly, a bicycle can stay upright without a rider as long as it’s moving at 8mph or faster.
The longest tandem bike ever built had 35 seats and was about 67 feet long!
The most expensive bike ever, a Trek Madone or the "Butterfly Bike" designed by artist Damien Hirst, was auctioned for $500,000 at Sotherby's.
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