Do flip flop hubs have the same threading on both sides?
08-28-20, 12:51 AM
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Do all flip flop hubs have the same threading on both sides?
Newbie question here, do both sides of ALL flip flop hubs have the same threading? Can I remove the fixed cog and install freewheel so I will have freewheel on both sides Or vice versa? or is one side dedicated to fixed cog only and freewheel one side? Reason I ask is because fixed cog has a lock ring (that threads opposite direction) and a freewheel doesn’t.
Last edited by jay4usc; 08-28-20 at 12:56 AM. Reason: Adding info
08-28-20, 01:00 AM
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Newbie question here, do both sides of ALL flip flop hubs have the same threading? Can I remove the fixed cog and install freewheel so I will have freewheel on both sides Or vice versa? or is one side dedicated to fixed cog only and freewheel one side? Reason I ask is because fixed cog has a lock ring and a freewheel doesn’t.
The fixed side has a slightly smaller diameter section for about half the length for the lockring. This makes a freewheel possible, but weaker with only half the threads holding the body to your hub.
08-28-20, 01:29 AM
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Huh?
There are track hubs, with fixed on one side only.
There are fixed/fixed hubs
There are fixed/free hubs
there are even free/free hubs, but they are rarer. That's because there are easier ways to have multiple freewheeling gears.
You said you have a fixed/free wheel, which means one side is threaded for a freewheel, and the other has the smaller diameter shoulder to accept the lockring, so your fixed cog doesn't spin off from backpedaling.
There are track hubs, with fixed on one side only.
There are fixed/fixed hubs
There are fixed/free hubs
there are even free/free hubs, but they are rarer. That's because there are easier ways to have multiple freewheeling gears.
You said you have a fixed/free wheel, which means one side is threaded for a freewheel, and the other has the smaller diameter shoulder to accept the lockring, so your fixed cog doesn't spin off from backpedaling.
Last edited by Unca_Sam; 08-28-20 at 01:32 AM.
08-28-20, 10:48 AM
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If the number of threads is sufficient for a track cog, why wouldn’t it suffice for a freewheel. Very powerful track sprinters race track bikes with fixed track cogs without any problem. So, the correct answer is yes, it’s perfectly fine to use a freewheel on the fixed threaded side of a hub.
08-28-20, 10:57 AM
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If the number of threads is sufficient for a track cog, why wouldn’t it suffice for a freewheel. Very powerful track sprinters race track bikes with fixed track cogs without any problem. So, the correct answer is yes, it’s perfectly fine to use a freewheel on the fixed threaded side of a hub.
tejano, thanks for the clarification. I just want to make sure the freewheel will not get damage installing it on a fixed threaded hub.
08-28-20, 11:00 AM
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Rest assured that it won’t be a problem. The freewheel and fixed cog threading is exactly the same.
