On Tue, Mar 3, 2009 at 2:02 PM, Shaun Meehan <meehan.sh...@gmail.com> wrote:

> This might sound like a dumb question but I've never run a fixed gear so I
> don't know. How does the threading for a fixed gear differ from the
> threading for a freewheel?
>
> Shaun Meehan
>

Shaun: not a dumb question at all. Both a screw on freewheel and a screw on
fixed cog have the same threads. But a purpose built fixed hub will have, in
addition to the threads for the cog itself, smaller-diameter and
reverse-threaded threads for a lockring: reverse threaded so that the
unscrewing (due to leg backpressure on the cog) forces on the cog will serve
to tighten the lockring.

(Smaller so that you can get the cog onto the hub.)

You might like riding fixed. Before I started, I thought it was all
posturing. Then my brother gave me an old Schwinn Tempo frame for a fixed
conversion, which I undertook. I loved it. That was amost 13 years ago. Now
I ride nothing else, uphill and down, loaded and free, except off road where
I ride a single speed freewheel because trying to spin down a steep hill in
a low fixed gear is this world's nearest approximation to one of the lower
'bolgia" of hell.

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