Fixie Bikes/Single Speed Bikes
A 'fixed gear' bike is one with just one gear and no freewheel. This means that when the back wheel turns, the pedals are always turning. However, most fixies have a 'flip-flop' hub, which lets you have a fixed gear on one side and a freewheel on the other. If you want to be able to stop pedalling while you roll along, you can swap between the two and still enjoy the benefits of single speed riding.