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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 04-22-05, 06:57 PM   #1
mathmo
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Conversion of a single speed to a fixed gear??

Recently brought a 2nd hand mtb that I thought was a fixed speed, only to find out when it arrived that it is simply a single speed. How should I go about converting it to a fixed gear??
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Old 04-22-05, 09:06 PM   #2
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I'm guessing the hub's threaded for a freewheel only, not for a cog and lockring.

In that case, you can do the sketchy loctite track cog thing that the kids love these days, or you can do it right and build up a new back wheel for it.
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Old 04-22-05, 11:20 PM   #3
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I'm rather new to this, never having had a fixed gear bike. Plus over in nz it seems having fixed gear bikes is now where near as common as over sense (to say simply less common probably doesn't quite do the situtation justice, I have never seen or even heard of a fixed gear mtb anywhere in nz!). So how should I be able to tell if the hub is threaded for freewheel only?

What do you mean by "ketchy loctite track cog thing"?? And how would I "do it right"?? Or maybe more easily there is an appropriate site I could be referred to detailing how to do a single speed to fixed gear conversion?
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Old 04-23-05, 11:24 PM   #4
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I'm in the same position: In NZ, trying to build a fixie (although on a road bike).
I went down to a bike shop today and talked to a mechanic for a while. I think if you have a bmx style SS freewheel, it will be screwed onto a 'threaded freewheel hub'. If you unscrew the SS cog, you can screw on a fixed sprocket.

The dodgy loctite method mentioned refers to the use of a strong glue to hold the fixed sprocket in place. It is advisable to put a bottom bracket lock ring on as well to hold it tight. These steps are necessary because otherwise, when you backpedal, the sprocket would fly off (and you would be in the $h^t).

Doing it right: a track hub is specially designed so you dont need these dodgy patch ups to hold the bike together. But they're expensive.

I'm going with the dodgy method because my bank balance is more important than my bodily preservation
and im gonna have a front break.

...just what i've picked up in the last few days, hope i'm not too incorrect...
Check out sheldonbrown.com -it's good

Where in NZ are you? i'm in welly - and ive never seen a fixie either
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Old 04-24-05, 03:04 AM   #5
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elementary is right, sheldon brown has almost any bike info you may need...especially when it concerns fixed gears. Specifically http://sheldonbrown.com/fixed-conversion.html The language is for someone with intermediate bike mech experience, but folks on this forum could explain anything that needs it. Also, if you choose to use a thread-locking chemical, note that they come in several grades, and use the absolute strongest available (I think the US version is LocTite red). This will permanantly fix your cog to the hub, so also make sure you like the gear you're in first!
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Old 10-23-05, 05:51 PM   #6
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Hi elementary, I'm in Auckland. Haven't got around to converting it yet, because I've been busy with Uni, work, life, etc... as it happens. Besides I'm reasonably happy with how it is, although I might lock into it some more during the summer break.

Been spending a LOT more time riding around in the city, and during my travels I've noticed I think one fixed gear bike (plus a few single speeds as well), and once saw another rider at a bike shop with a fixed. So it seems they do to exist in nz, although not like over in america where it seems they are relatively common. Are we just too hilly here?

Shouldn't buying a track wheel and putting that on a road bike work? Or is there something I'm missing.... possibly.
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