A fixed gear cycle is basically the simplest form of a bicycle. On a fixie, the rear cog which is the small wheel with teeth on it (see image below) onto which the chain engages doesn't have the Pawl and Ratchet mechanism. In a normal cycle with a freewheel, this mechanism engages the gear when you pedal in the forward direction and makes the wheel free when you pedal in the reverse direction or do not pedal. With this system absent on a fixie, you can power the rear wheels by pedaling in both forward and reverse directions. But generally back pedaling (pedalling backwards) is done to brake the rear wheels which is why you don't see brakes or only a front brake. Essentially you are always in control of your bike and feel closer to the road. A fixed gear drivetrain is mechanically more efficient than the traditional freewheel ones and you reach higher speeds.
Wait! There is more, just because you bought a fixed gear cycle doesnt mean you have to give up on the freewheel. You bought a Scolarian Fixie which comes equipped with a Flip Flop Hub. It has a fixed gear cog on one side and a freewheel on the other. So, whenever you are tired or just want to enjoy the whiz down a hill, simply loosen the axle nuts, remove the wheel, flip it to engage the freewheel onto the chain and tighten the nuts. Yes, it is that simple and we provide you with all the tools required to do so and a saddle bag to carry them all around.
Also, check out this cool video on 5 reasons to ride a Scolarian Fixed Gear Bike