Originally Posted by kevinlaba
His bike only has a freewheel during certain scenes (i.e. those involving jumps, and a few others, I believe) - most of the time it's fixed. I'm assuming the filmmakers figured people wouldn't notice. Either way, there are no brakes to be seen the whole time.
Although through the whole movie there is this superimposed sound of a clicking freewheel when he's riding or walking his bike...