Suggestions for dealing with a "frozen" track cog? - Page 2

02-01-2005, 08:42 PM

In article <1107288547.669980.31400@c13g2000cwb.googlegroups. com>,
"rcoder" <[Only registered and activated users can see links. ]> writes:

> I recently decided to switch down from a a 16 to 15-tooth cog on my
> road-conversion fixie. After I picked up the new cog and pulled the
> lockring, I spent the better part of an hour wrestling with the old
> cog, pulling as hard as I could on the chain whip in hopes of freeing
> it. So far, I've been completely unsuccessful.
>
> It is entirely possible that I'm just not strong enough and will need
> some additional leverage, (or the help of a friend with more upper body
> strength) but I just wanted to see what other people's experiences had
> been when switching out track cogs on relatively heavily-used
> "commuter" fixed gear bikes. I assume that any manual force I could
> exert on the wheel (so long as it's relatively in-line with the normal
> rotational and braking forces) shouldn't do any damage to it, but
> wonder if I should be trying solvents or something, rather than
> continuing to attempt the brute-force approach.
>
> Any recommendations would be appreciated.

Just on the off-chance you're attempting this with the wheel off
the bike and the tire off the wheel, and standing the naked rim
upright on the floor:

try putting the tube & tire back on and inflating it. That'll
give your wheel-supporting hand a better grip, and the tire
will help keep the wheel from sliding while you reef on the
chain whip.

Otherwise ... good ol' Liquid Wrench, I guess.

cheers,
Tom

--
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03-06-2005, 06:49 PM

"Buck" wrote:
"Try placing the cog in a vise (use blocks of wood to prevent damage to the
cog)"

It is better to place the chainwhip or cog tool in the vise and then turn
the wheel. If you put the cog in the vise the force of the vise will pinch
the cog against the hub.

--
Mike Murray

03-06-2005, 06:49 PM

"Buck" wrote:
"Try placing the cog in a vise (use blocks of wood to prevent damage to the
cog)"

It is better to place the chainwhip or cog tool in the vise and then turn
the wheel. If you put the cog in the vise the force of the vise will pinch
the cog against the hub.

--
Mike Murray