A double sided hub,
intended to take a sprocket or freewheel on each side.

The gear of a one-speed bicycle could be changed by removing the wheel,
and installing it backwards.

Most flip-flop hubs are intended to accept a fixed sprocket on one or both sides.

There is a special BMX variant of flip-flop hub which is intended to take a single-speed freewheel on each side.

This type has a standard thread on one side,
and a smaller thread on the other side,
which fits special undersized 15- and 14-tooth freewheels.

(There is not room to fit a freewheel mechanism inside of a 15-tooth or smaller sprocket, with a normal sized hub.)



32 hole, fixed gear/single speed, Sealed cartridge bearings, hollow threaded axles.






'''''''''''''''''''''''''''' One side threaded for single speed freewheel,

                                    one side threaded for fixed gear. '''''''''''''''''''''''''''''''''''''''''






Bolt on or quick release (bolts included).

With either 135mm mtn. bike or 130mm road bike rear spacing.