Shimano cassette replacement IG and HG?

bulter9090

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Mar 2, 2003, 12:43:03 PM3/2/03

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After the chain broke on my 21 speed 1996 bike I replaced it only to find
the chain now slips when in the 4th - 7th rear gears. After doing some
research I understand this is a common problem when the chain is replaced it
no longer fits the worn rear cogs (my bike's probably done 4000 miles or
so).

So I try to find a replacement for the shimano IG 2 cassette that I have but
but no one can now supply me with one as it's too old. It's been suggested
that I replace it with a HG one. As a newbie I would like somebody to
confirm that this will be compatible with my IG derailleurs and front chain
rings before I start buying the tools and HG cassette.

Thanks for any help.

Brian Huntley

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Mar 2, 2003, 12:59:25 PM3/2/03

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HG Sprockets are thinner, and 'modern' chains take that into
consideration according the manufacturers' bumf. Spacing is the same.
You'd have more problems sticking with IG parts than switching to HG,
most likely.

Mike S.

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Mar 3, 2003, 12:42:27 PM3/3/03

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"bulter9090" <n...@na.com> wrote in message
news:5or8a.2905$gq3....@newsfep1-gui.server.ntli.net...

I haven't done it, but I've heard that you can use HG cogs on UG hubs. If I
remember the thread, you have to file one of the splines on the cogs to make
them fit your UG hub. You probably haven't worn out your small cog, so you
can probably use it as the lockring again.

There was a thread either here or rec.bicycles.misc about someone that did
the conversion. You may want to do a google search for the entire
discussion.

Mike

bulter9090

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Mar 4, 2003, 12:28:05 PM3/4/03

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> I haven't done it, but I've heard that you can use HG cogs on UG hubs. If
I
> remember the thread, you have to file one of the splines on the cogs to
make
> them fit your UG hub. You probably haven't worn out your small cog, so
you
> can probably use it as the lockring again.
>
> There was a thread either here or rec.bicycles.misc about someone that did
> the conversion. You may want to do a google search for the entire
> discussion.
>
> Mike
>
>

Thanks for the replies. As a newbie I'm a little confused - whats the
difference between IG (mine), HG and UG? :) And which is compatible with
IG? If it comes down to manually filing cogs then I think I'm out of my
depth :)

A Muzi

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Mar 4, 2003, 9:57:52 PM3/4/03

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"bulter9090" <n...@na.com> wrote in message

news:%l59a.1614$3A....@newsfep1-gui.server.ntli.net...

> Thanks for the replies. As a newbie I'm a little confused - whats the
> difference between IG (mine), HG and UG? :) And which is compatible with
> IG? If it comes down to manually filing cogs then I think I'm out of my
> depth :)

You can drop on an IG or HG casette directly with no modification. If an
HG, keep one spacer from your old set and install it on the body before your
new HG cassette set. ( IG bodies are slightly longer due to the specially
shaped 11t cog).

It's unlikely you will find a UG csassette without specifically seeking it.
They are uncommon. They are notable inthatthe last cog screws directly to
the body with no lockring.

HG and IG cassettes have one spline larger than the others so they will
install only one way. Lube the lockring thread and look at the torque rating
stamped right on its face. You cannot screw this up. Go for it!
--
Andrew Muzi
http://www.yellowjersey.org
Open every day since 1 April 1971