rear derailleur chainstay cable hanger loose

I am currently using friction downtube shifters, but want to upgrade to Ergo, though may be
stuck with STI.

My rear derailleur chainstay cable hanger on my 88ish Cannondale has some play in it. This
usually causes automatic, unexpected shifting towards a smaller cog some time after a shift in
the same direction. This has caused me to crash once when I was out of saddle and the chain
slipped during a shift.

The hanger is held by two blind rivets. I got the Cannondale second-hand over 5 years ago. I
could be wrong, but I think the riveting was a home job. I would have placed the rivets in-line
with the cable.

Here is a picture: http://angelfire.com/alt/spacey/hanger.jpg

What would you do about this?

I am not familiar with rivets. Is there a way to remove the rivets without the inner side of the
rivet making a home in the chainstay?

Spacey

 

You should be able to get that taken care of at just about any long-time Cannondale dealer, and
possibly others as well. They're just pop rivets, nothing fancy. Very easy to install. Yes, you will
have something rolling around in your tubes after you grind or drill out the old ones, but they
should come right out at the bottom bracket opening (just remove your cranks & bottom bracket).

For examples of pop rivets, go to http://www.poprivet.com (where else??? :>)

--Mike-- Chain Reaction Bicycles http://www.ChainReactionBicycles.com

"Spacey Spade" <[email protected]> wrote in message
news:[email protected]...
>
> I am currently using friction downtube shifters, but want to upgrade to Ergo, though may be stuck
> with STI.
>
> My rear derailleur chainstay cable hanger on my 88ish Cannondale has some play in it. This usually
> causes automatic, unexpected shifting towards a smaller cog some time after a shift in the same
> direction. This has
caused
> me to crash once when I was out of saddle and the chain slipped during a shift.
>
> The hanger is held by two blind rivets. I got the Cannondale second-hand over 5 years ago. I
> could be wrong, but I think the riveting was a home job. I would have placed the rivets in-line
> with the cable.
>
> Here is a picture: http://angelfire.com/alt/spacey/hanger.jpg
>
> What would you do about this?
>
> I am not familiar with rivets. Is there a way to remove the rivets
without
> the inner side of the rivet making a home in the chainstay?
>
> Spacey

 

In article <[email protected]>, Spacey Spade
<[email protected]> wrote:
>
>I am currently using friction downtube shifters, but want to upgrade to Ergo, though may be stuck
>with STI.
>
>My rear derailleur chainstay cable hanger on my 88ish Cannondale has some play in it. This
>usually causes automatic, unexpected shifting towards a smaller cog some time after a shift in
>the same direction. This has caused me to crash once when I was out of saddle and the chain
>slipped during a shift.
>
>The hanger is held by two blind rivets. I got the Cannondale second-hand over 5 years ago. I
>could be wrong, but I think the riveting was a home job. I would have placed the rivets in-line
>with the cable.
>
>Here is a picture: http://angelfire.com/alt/spacey/hanger.jpg
>
>What would you do about this?

Drill out those rivets and install new ones.

>I am not familiar with rivets. Is there a way to remove the rivets without the inner side of the
>rivet making a home in the chainstay?

Before you reinstall the rivets you can put a couple drops of glue inside the chainstay to collect
the jingly bits.

--Paul

 

Mike Jacoubowsky wrote:
>You should be able to get that taken care of at just about any long-time Cannondale dealer, and
>possibly others as well. They're just pop rivets, nothing fancy. Very easy to install.

Took it to BikeSport (bikesport.com). Awesome place, I recommend it. I'd say it's as good, if not
better than Daniel Boone's www.danielboonecycles.com.

>Yes, you will have something rolling around in your tubes after you grind or drill out the old
>ones, but they should come right out at the bottom bracket opening (just remove your cranks &
>bottom bracket). [snip]

Bike mechanic said the holes at the bottom bracket, if any, would be too small.

>--Mike-- Chain Reaction Bicycles http://www.ChainReactionBicycles.com
>
>
>"Spacey Spade" <[email protected]> wrote in message
>news:[email protected]...
>>[snip] My rear derailleur chainstay cable hanger on my 88ish Cannondale has some play in it.
>>[snip] The hanger is held by two blind rivets. [snip]

 

Paul Southworth wrote:
>Spacey Spade <[email protected]> wrote:
>>My rear derailleur chainstay cable hanger on my 88ish Cannondale has some play in it. This usually
>>causes automatic, unexpected shifting towards a smaller cog some time after a shift in the same
>>direction. This has caused me to crash once when I was out of saddle and the chain slipped during
>>a shift. The hanger is held by two blind rivets. [snip]
>
>Drill out those rivets and install new ones.
>
>>I am not familiar with rivets. Is there a way to remove the rivets without the inner side of the
>>rivet making a home in the chainstay?
>
>Before you reinstall the rivets you can put a couple drops of glue inside the chainstay to collect
>the jingly bits.

That's just what the mechanic at BikeSport did. I decided this was one thing I didn't want to
do myself. Riveting might be easy, but I'm sure it wouldn't hurt to practice some on something
less critical.