If the bicycles belong to ONE FRIEND, it's "friend's bicycles." If the bicycles belong to TWO OR MORE FRIENDS, it's "friends' bicycles."
whats a streamlined?
1.8 bicycles.
There is no specific collective noun for bicycles, in which case a noun suitable for the situation is used, for example a rack of bicycles, a row of bicycles, a standof bicycles, etc.
Yes it does it has a streamlined body
penguin is streamlined to swim in cold waters
Streamlined often means aerodynamic.
wATER BEING STREAMLINED.
what did the ancient bicycles look like?
Bicycles weren't invented in Canada.
More bicycles
The first bicycles were powered by humans.