But a similar hub is also used when you need two drive sprockets on a wheel, like when using a gas or some electric motor conversion kits.
These are also used on some pedal trikes where it will have a single sprocket on one side that transfers movement to a rear axle, and the other side has a freewheel cassette (to the front chainring) allowing you to have multiple gears on a trike.
stbmx on
The other comment is right. It’s a Flip flop hub – one side to run fixed and flip it round to run your freewheel. You don’t need locking rings as the direction of travel means the freewheel, or flip it yo fixed cog, is always tight.
Bluechip506 on
Single speed free hub on one side an a fixed gear on the other.
ww_ggg_d on
It may not be the case for this hub; with the extended axle length, but the flip/flop hubs I used when racing BMX were to fit different tooth count freewheels. The “standard” size side would fit 16t and up,. The “small” side would fit 14t and 15t.
biker543 on
Most likely a freewheel on one side (the longer side) and a thread on band brake on the other.
SpamDog_of_War on
Looks to me like a cheap tandem hub with a roller brake on the non drive side.
yottyboy on
These first appeared on early BMX bikes so you could do tricks. Flip the wheel around for fixed gear so you could pedal backwards and stuff. Freewheel for regular pedaling.
wood4536 on
Nah that’s a normal flip flop hub, you can use a freewheel on one side and a fixed gear with a spacer on the other.
9 Comments
FlipFlopHub, used on Fixies.
They make hubs with two freewheel sides for a few reasons. One is because you can get a [Disc Brake Adaptor](https://www.amazon.com/WIROJ-Bicycle-Freewheel-Threaded-Aluminium/dp/B09PZY4K4C/) for one side.
But a similar hub is also used when you need two drive sprockets on a wheel, like when using a gas or some electric motor conversion kits.
These are also used on some pedal trikes where it will have a single sprocket on one side that transfers movement to a rear axle, and the other side has a freewheel cassette (to the front chainring) allowing you to have multiple gears on a trike.
The other comment is right. It’s a Flip flop hub – one side to run fixed and flip it round to run your freewheel. You don’t need locking rings as the direction of travel means the freewheel, or flip it yo fixed cog, is always tight.
Single speed free hub on one side an a fixed gear on the other.
It may not be the case for this hub; with the extended axle length, but the flip/flop hubs I used when racing BMX were to fit different tooth count freewheels. The “standard” size side would fit 16t and up,. The “small” side would fit 14t and 15t.
Most likely a freewheel on one side (the longer side) and a thread on band brake on the other.
Looks to me like a cheap tandem hub with a roller brake on the non drive side.
These first appeared on early BMX bikes so you could do tricks. Flip the wheel around for fixed gear so you could pedal backwards and stuff. Freewheel for regular pedaling.
Nah that’s a normal flip flop hub, you can use a freewheel on one side and a fixed gear with a spacer on the other.