RFC

nt

Cynikal 

yes

Tapeworm21

Depends on the hub. If the other side is one single thread diameter, yeah. If it has a "ledge" on the threads, please don't. Some hubs are "fix/fix," some are "SS/Fix," and I've never seen a "SS/SS" one but I suppose they might exist.

Aeroplane

How would putting a freewheel on fixed-threading not work?

Vrede

I might be totally wrong, but I think there might be more threads for the ss side than the fg side.

riderx

Incorrect. You can install a freewheel on either side of a fixed/free flip-flop hub. Free/free hubs exist, but you don't need one to run a double freewheel.

Aeroplane

So?

Vrede

I was told by my local shop, it will work for some period of time. But in the long run it will probably fail.

genericbikedude

in the long run we're all dead.

Velocità

the cog side of a fixed/free hub will have less threads on the fixed side for the freewheel to engage on as it is step threaded and partially reverse threaded, but should still work.

free/free hubs do exist, primarily for BMX applications, but generally one side has a bit of a different diameter to run freewheels with less than 15 teeth

I<3Spraypaint

very true but ACS makes a left handed freewheel so it is possible

riderx

It will have the same number of threads engaged as you would if you were running a fixed cog.

And if you don't believe me that it's OK, then listen to Sheldon. Don't f*&^ with the Sheldon.

Aeroplane

Your shop is dumb. It will totally work. riderx is with me on this, and he has a red star. win.

barba

I have run a freewheel on a fixed/fixed hub with no issues. Fixed/fixed hubs are the best when it comes to versatility.

Velocità

possible for what? left handed freewheels are for left side drive applications and as such would not work with RHD drivetrains

RFC

Thanks all.

djeucalyptus

+1. Besides... I don't think there's a RHD/LHD flipflop hub out there that isn't 14mm, making it entirely useless.

and to the OP's question, I've done it in the past without any problems. Freewheels have significantly less forces at play with the hub threads compared to a fixed cog, so the threading (even if there isn't a ton) really isn't a problem.

dirtyphotons

i've been in the freewheel on the fixed side camp for several years. used it in races, mountain bike trails, loaded touring, no problems. everytime a shop employee told me that it was "wrong" i'd give a hearty guffaw and go order my parts online (which realistically i'd probably have done anyway).

now i am a part time shop employee, and i've seen three stripped fixed/fixed hubs that had freewheels on them. to be fair, they were stock on giant boweries (out of a probable twenty our shop has sold) and i don't think they were formula or dimension so maybe it's a hub quality issue.

c0urt

my vote says yeah

Yoshi

I'm doing it with no problems yet. I asked the owner of my LBS what he thought and his response was "Have you ever heard of anyone having problems doing this?"

No. No I haven't. And neither has he.