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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 11-30-08, 11:58 AM   #1
moses
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singlespeed to fixed?

I am currently using a bmx type freewheel (redished and respaced). My question is if I put a cog and lockring on here am I likely to affect the chainline also would I need to apply threadlocker,if the fixie experience is not for me I want to be able to switch back
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Old 11-30-08, 12:02 PM   #2
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No.

You cannot put a track lockring on a single-speed hub. For one, lockrings are reverse-threaded and have a smaller circumference.

You can "suicide hub" it. It generally involves installing a track cog with some mix of rotafixing, JB weld, and red (heat-only release) threadlocker. Obviously this is NOT reversible.

If you want "the fixie experience", go try a friend's bike.
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Old 11-30-08, 12:21 PM   #3
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and red (heat-only release) threadlocker. Obviously this is NOT reversible.
You just contradicted yourself.
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Old 11-30-08, 12:33 PM   #4
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You just contradicted yourself.
I was talking about a mash-up of all three.

Combine loctite with a JB weld fillet and if you try to reverse that whole mess, well, I'd like the hub afterwards. Just because you can grind off the cog doesn't mean the threads will ever be usable.
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Old 11-30-08, 01:09 PM   #5
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I was talking about a mash-up of all three.

Combine loctite with a JB weld fillet and if you try to reverse that whole mess, well, I'd like the hub afterwards. Just because you can grind off the cog doesn't mean the threads will ever be usable.
If you're going to red loctite, you aren't going to need the JB weld. And red loctite, is removeable.
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Old 11-30-08, 02:28 PM   #6
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In any case, moses, unless you want to bum bike your hub, you're going to be buying a wheel with a fixed hub or relacing the rim you have to one unless it's already a fixed/free hub.
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Old 11-30-08, 03:05 PM   #7
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you can get a pair of cheap 700c wheels with flip flop hub on Ben's Cycle, or you can search the ebay for some deals. But most likely a good just to get a whole new wheel or wheelset with a flip flop hub
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Old 11-30-08, 03:12 PM   #8
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You don't need locktite or JB Weld unless you're going in for skids and the like, in which case you're better off with the locking ring.

You've got brakes already (unless you're sticking your foot in the wheel to stop). A suicide hub is okay if you're using your brakes for hard stopping and you put the cog on really really tight (search for rotafix). Fit a track cog and give it a go. When you discover you prefer fixed, get your wheel rebuilt with a flip flop hub.

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Old 11-30-08, 03:17 PM   #9
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You don't need locktite or JB Weld unless you're going in for skids and the like, in which case you're better off with the locking ring.
This is bad advice.

If you are not going to run a hub that has a provision for a reverse threaded lockring, that cog is liable to come off rotafix, brake or not.

Last edited by operator; 11-30-08 at 03:23 PM.
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Old 11-30-08, 03:43 PM   #10
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This is bad advice.

If you are not going to run a hub that has a provision for a reverse threaded lockring, that cog is liable to come off rotafix, brake or not.

I've been riding a rotafixed wheel, with a BB lockring for months, skidding and all, no brakes.

Yeah the BB lockring threads clockwise like the cog, but does a pretty good job of holding it in place. Did not thrash the threads on the hub or cog, and have never had it slip. Takes a good reverse rotafix to remove it, but its doable.


Take a bolt, thread a nut on all the way. Then thread another nut on and tighten it against the first nut as hard as you can. You are now not gonna be able to loosen the first nut, no matter how loose you tightened it to begin with. Now imagine that it has tightening pressure 90% of the time. Its not coming off.

I'm not saying its the best solution, or even the correct one, but it works for me, as well as many others here. Just make sure you grease the threads before hand. I'm also not saying its not gonna fail ever, but I'm willing to take the risk. If he likes riding fixed, then he can ride this way and save up for a "true" track hub or wheel


Now... When I get my new frame tomorrow, I am gonna be building it up correctly, and using a track hub. It has worked for me, and I was in the same situation as the OP, ran SS, wanted to try fixed, and this was a fast, simple, cheap solution, be it not the best.
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