SRAM PC-990 -break...

"Dave Mennenoh" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

It's just a fluke right? Saturday, I put on a brand spanking new PC-990
chain, along with a new PG-990 cassette, and new middle chain ring (XT).
Yesterday, I did a race. The bike was running perfect, shifting quick and
quiet, etc. At about 8 miles in the chain breaks. I had wondered about
that gold connector coming apart, but it was fine. Cool. It was just a
regular link, a pin pulled through the face plate.
I've always used Shimano and used my last HG-93 chain for two race seasons
without an issue. Just gives me a bad feeling when I have a top of the
line chain break the first time on it.

--
Dave -
www.blurredistinction.com/director
www.macromedia.com/go/team

BUMMER! Were you shifting when it failed, or just cranking? If shifting,
front or rear?

Dave ( NOOOO! Not the great shazam! Oz will not be pleased!)

Quoted message said:

Quoted message said:

Were you shifting when it failed, or just cranking? If shifting, front or
rear?

Just cranking. It started to skip, and then failed...

I just went over it and it seems ok. Hopefully it was just a bad link. I am
going to go out and do some trails now to test it out.

--
Dave -
www.blurredistinction.com/director
www.macromedia.com/go/team

" I am
going to go out and do some trails now to test it out. "

Sounds dangerous. You should be complaining to the manufacture.

Dave Mennenoh said:

Quoted message said:

Quoted message said:

Were you shifting when it failed, or just cranking? If shifting,

front or

Quoted message said:

Quoted message said:

Quoted message said:

rear?

Just cranking. It started to skip, and then failed...

I just went over it and it seems ok. Hopefully it was just a bad

link. I am

Quoted message said:

going to go out and do some trails now to test it out.

It probalbly would have been better if it was just the power link that
failed. I am hoping that I am wrong about this, but did you just cut a
link out and return the chain to service? The reason I ask is that SRAM
uses a stepped pin on the 990 and others) just like Shi*mano, and just
like shi*mano the pins are not meant to be reused (thus the power
link). If the chain failed, you should return it. Removing a link and
pushing the pin back in is just looking for a failure.

R

Quoted message said:

I am hoping that I am wrong about this, but did you just cut a link out and
return the chain to service? The reason I ask is that SRAM uses a stepped
pin on the 990 and others) just like Shi*mano, and just like shi*mano the
pins are not meant to be reused (thus the power link). If the chain failed,
you should return it. Removing a link and pushing the pin back in is just
looking for a failure.

Well, that sucks that they use a pin like that. And yes, when it broke I had
no choice but to just cut a link out and get back to racing. I had no idea I
had to put a new power link in. It only came with one power link, which I
used to initially install the chain on the bike.

I rode some hard trail yesterday and the chain worked without problem, but
now I want to fix that link with the bad pin. Though, I have no clue how I
will find it.

You know it says nothing in the chain instructions that you can't push a pin
back in. Lame. Makes me want to go back to Shimano.

--
Dave -
www.blurredistinction.com/director
www.macromedia.com/go/team

I've always used Shimano and used my last HG-93 chain for two race seasons
without an issue. Just gives me a bad feeling when I have a top of the line
chain break the first time on it.

Bummer! I swapped from shimano chains to sram, following a similar incident on a trailquest and this was a new chain first time out. I also had a 3 month old shimano chain snap, but never any probs with sram, and I wouldn't go back to the big s - guess it's just luck of the draw 🙂

Dave Mennenoh said:

Quoted message said:

I am hoping that I am wrong about this, but did you just cut a link
out and return the chain to service? The reason I ask is that SRAM
uses a stepped pin on the 990 and others) just like Shi*mano, and
just like shi*mano the pins are not meant to be reused (thus the
power link). If the chain failed, you should return it. Removing a
link and pushing the pin back in is just looking for a failure.

Well, that sucks that they use a pin like that. And yes, when it
broke I had no choice but to just cut a link out and get back to
racing. I had no idea I had to put a new power link in. It only came
with one power link, which I used to initially install the chain on
the bike.
I rode some hard trail yesterday and the chain worked without
problem, but now I want to fix that link with the bad pin. Though, I
have no clue how I will find it.

You know it says nothing in the chain instructions that you can't
push a pin back in. Lame. Makes me want to go back to Shimano.

It's more of a liability issue than it is an actual issue. If you do it
right, and you properly peen the pin afterwards, then it isn't really a
problem. You'll need an anvil-like surface and a ball peen hammer to
flare out the edges of the pin.

IMO, too much trouble to do on a regular basis. Then again, if you carry
anvils with you on the trail...
--
Phil, Squid-in-Training

Quoted message said:

Quoted message said:

Is that why they're on sale at Jenson?

Possibly.
I emailed SRAM first thing this am... no response yet.

So far, I am not impressed with this company. But I'm not writing them off
yet.

--
Dave -
www.blurredistinction.com/director
www.macromedia.com/go/team

"Phil, Squid-in-Training" <[email hidden]> wrote in
message news:[email hidden]...

Quoted message said:

Dave Mennenoh said:

Quoted message said:

I am hoping that I am wrong about this, but did you just cut a link
out and return the chain to service? The reason I ask is that SRAM
uses a stepped pin on the 990 and others) just like Shi*mano, and
just like shi*mano the pins are not meant to be reused (thus the
power link). If the chain failed, you should return it. Removing a
link and pushing the pin back in is just looking for a failure.

Well, that sucks that they use a pin like that. And yes, when it
broke I had no choice but to just cut a link out and get back to
racing. I had no idea I had to put a new power link in. It only came
with one power link, which I used to initially install the chain on
the bike.
I rode some hard trail yesterday and the chain worked without
problem, but now I want to fix that link with the bad pin. Though, I
have no clue how I will find it.

You know it says nothing in the chain instructions that you can't
push a pin back in. Lame. Makes me want to go back to Shimano.

It's more of a liability issue than it is an actual issue. If you do it
right, and you properly peen the pin afterwards, then it isn't really a
problem. You'll need an anvil-like surface and a ball peen hammer to
flare out the edges of the pin.

IMO, too much trouble to do on a regular basis. Then again, if you carry
anvils with you on the trail...

Why do you think my back is AFU?!?

Shaun aRe - It sure wasn't the mig welder did it...

Bad plate,pin or chain tool operator. Last chain that
broke on me was back in 96. Right, new bike pin not seated right and
hitting both derailleurs and then no chain. No chain tool or even some
wire to use as a pin. Walked 5 mile back in the dark. Keep a chain tool
in every bag or pack. Use it and pull a link and your home free..

I don't know about that one. I use them pins over and
over. Sram PC -48,58,68,59,69,89,& 99. Power links got them little
white bags shacking up in my parts box.

It was not operator error. It was first install of the chain. I removed
about 5 links to make it the right length, and then stuck in the power link.
Besides, I know how to use a chain tool. And like I said, I rode hard trails
the next day after the break and had no issues at all with it.

You said: "I use them pins over and over. Sram PC -48,58,68,59,69,89,& 99"
But then in your next message you said you hadn't broken a chain since 1996.

Do you mean that you never use the power links when installing a new chain?
They do seem pretty useless actually.

It does say on SRAM's site that you shouldn't use the pin again - though
they fail to mention that within the pamphlet that comes with the chain. I
think that's really lame.

I emailed SRAM telling them of my dissapointment, but they have yet to
reply. Figures.
I guess what I will do is keep using the chain as is, with the supposedly
bad pin reinstalled, and just buy a new powerlink so when it fails again
I'll stick in a new powerlink. Though I don't like the idea of just waiting
for it to fail.

Will a HG-93 chain work well with a PC-990 cassette? I may just go buy a new
Shimano chain and junk the SRAM and be done with it.

--
Dave -
www.blurredistinction.com/director
www.macromedia.com/go/team

" Though I don't like the idea of just waiting
for it to fail. "

Just broke my chain on tuesday pedaling full force. Slammed my knee on
the handlebars and took a pedal to the calf. I was [censored].

"stevemtbsteve" <[email hidden]> wrote
in message news:[email hidden]...

Quoted message said:

I've always used Shimano and used my last HG-93 chain for two race
seasons
without an issue. Just gives me a bad feeling when I have a top of the
line
chain break the first time on it.

I'm amazed you got two race seasons out of any chain. I only got half a
season (1400 km) out of the OEM HG-73 and XT chainring on my new Kula
Deluxe.
I've always preferred SRAM chains to shimano. I've found them to last
longer and be easier to maintian, admittedly the only shimano chains I've
had have been OEM ones that I've changed to SRAM at the first opportunity.

I would suspect nearly all chain breakages come from a previously misaligned
plate.