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Flip Flop safe?

Old 06-24-20, 02:13 PM
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Barry2 
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Flip Flop safe?

I expected a Flip Flop hub to have a narrow strip of 1.37x24 with provision for a lock ring on one side.
The other side having only a wider strip of 1.37x24 and no lock ring provision.
I've researched and found pictures of exactly this setup.

My Dura Ace rear HB-7710 hub has 1.37x24 and lock ring on both sides.

Obviously it is designed to accept a cog on both sides, is this still safe & OK for freewheel installation?
For example, I don't wish to damage the LH threads with the freewheel.

Barry
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Old 06-24-20, 03:54 PM
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There are two kinds of double-sided rear track hubs - fixed/fixed and fixed/free.

There are people who will argue about this until they have a stroke but it's perfectly safe to use a freewheel on fixed threading.
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Old 06-24-20, 04:03 PM
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Personally, I don't know why they aren't all fixed/fixed.
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Old 06-24-20, 04:30 PM
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Yes you can run a freewheel on both sides. The different hubs were made for different audiences. The trackies want a hub they can gear for two different events or to ride to and from the track. The mixed hubs are for people who want to try fix gear but have a freewheel bailout. I'd only known of mixed fixed-free hubs until I asked the Portland fix gear guru if a fix-fix existed. Now I have a bunch of them.

As many of you know, I am a fix gear die-hard. My last singlespeed was my UO-8 up till 1976. Then I put on a fix gear wheel. Never looked back. I've had at least one fix gear in my stable since then (currently 3 of 5 bikes. 2 have fix-fix hubs. Have all the cogs from 12 to 24.)

A little off topic but the one hub that didn't pan out for me was the beautiful fix-fix Miche of their high end boxed set. Not enough available lockring threads using a very track-common Eurasian 1/8" cog. Stripped both sides. Rode Cycle Oregon last fall with no lockrings, (Well, one was on but only for decoration.) As others have said, if you are aware, ride smart and use brakes, not an issue. I blasted down the north entrance to Crater Lake on a 42-12. Only issue was the aching cheeks from the ear-to-ear grin. My all time favorite fix gear descent. And that is a great gear for it.

I've had zero thread issues with the considerably cheaper Miche fix-fixes Some of mine now have many thousands of miles and lots of cog swaps. I do wish their axles had slots with tabbed washers. The lock nuts unscrew. If you sock the hub nut down on the unscrewed locknut, you break it but you won't notice until the broken nut falls off next time you flip the wheel. Never been a ride ender,, but still, Miche, you can do better.

Ben
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Old 06-24-20, 05:07 PM
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Thanks guys.

Got it, mine is fixed/fixed and I can use it fixed/free with no issues.

Standards are a wonderful thing, which is why we have so many !

Barry
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Old 06-24-20, 10:02 PM
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I thought this was going to be a thread on keeping your sandals secure from thieves. I personally just leave mine in the closet but maybe I should be keeping them in the firearms safe? What if someone steals them?
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Old 06-24-20, 10:05 PM
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You used theF word. Im telling dad!

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Old 06-24-20, 10:46 PM
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Originally Posted by Barry2 View Post
You used theF word. Im telling dad!

Barry
Yes indeedy I did use the word Flip Flops though technically that is two words. I don't recommend them for going to the range, hot brass on your tootsies is no fun and any good range would likely ban them.
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Old 06-25-20, 07:37 AM
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Originally Posted by Barry2 View Post
... is this still safe & OK for freewheel installation? For example, I don't wish to damage the LH threads with the freewheel.
You can't damage the LF lockring threads with the freewheel, because they are a smaller diameter, and the freewheel fits over them without making any contact. Think about it, how could you install a fixed cog on the inner RH threads, if it couldn't slip over the LH lockring threads without damaging them ?
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Old 06-25-20, 08:09 AM
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Originally Posted by TejanoTrackie View Post
You can't damage the LF lockring threads with the freewheel, because they are a smaller diameter, and the freewheel fits over them without making any contact. Think about it, how could you install a fixed cog on the inner RH threads, if it couldn't slip over the LH lockring threads without damaging them ?
it was the lead in I was worried about, not the threads themselves.

Barry
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Old 06-25-20, 08:19 AM
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Originally Posted by Barry2 View Post
it was the lead in I was worried about, not the threads themselves.
Sorry, you lost me there.
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Old 06-26-20, 11:03 PM
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Originally Posted by TejanoTrackie View Post
Sorry, you lost me there.
Pretty sure he lost himself too.
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