A
fixed-gear bicycle (or
fixed-wheel bicycle, commonly known in some places as a
fixie) is a
bicycle that has a
drivetrain with no
freewheel mechanism. The freewheel was developed early in the history of bicycle design but the fixed-gear bicycle remained the standard track racing design. More recently the "fixie" has become a popular alternative among mainly urban cyclists, offering the advantage of simplicity compared with the standard multi-geared bicycle.